Cleavage

Coincidence

SIX BEHAVIORS TO INCREASE YOUR CONFIDENCE

vocab from news:British Council Vietnam launches $12,000 digital content award program for IELTS teachers

Hermon Town Council Handbook Notes

Ch 3 health the ultimate treasure explores the concept that true health goes far beyond merely not being sick. These concise, scannable revision notes break down the most important concepts, including the definition of health, disease types, and lifestyle strategies for holistic well-being. [1, 2, 3] ## 1. What is Health? According to the World Health Organization (WHO), health is defined as "a state of complete physical, mental, and social well-being, and not merely the absence of disease or infirmity." [3] Health has three primary dimensions: [3] * Physical Health: Proper functioning of all body organs and having the energy to perform daily tasks without fatigue. * Mental Health: A positive attitude, emotional stability, and the ability to cope with daily stress. * Social Health: Having strong relationships, a supportive community, and avoiding feelings of isolation or loneliness. [3, 4] ## 2. Types of Diseases Diseases are broadly classified into two main categories: * Communicable Diseases: Diseases that can spread from an infected person to a healthy person (e.g., Influenza, Common Cold, Typhoid, Chickenpox). They are caused by pathogens like viruses, bacteria, and fungi. [5, 6, 7] * Non-Communicable Diseases (NCDs): Diseases that do not spread from person to person (e.g., Diabetes, Asthma). They are often the result of an unhealthy lifestyle, poor diet, lack of physical activity, or genetics. [5, 6, 7, 8] ## 3. Prevention of Communicable Diseases To stop infectious diseases from spreading, the chapter emphasizes the following hygiene and preventive measures: [5, 9, 10] * Personal Hygiene: Washing hands frequently, taking regular baths, and covering the mouth/nose when coughing or sneezing. * Vector Control: Preventing the breeding of mosquitoes (which spread Malaria and Dengue) by clearing stagnant water and using mosquito nets or repellents. * Clean Food and Water: Ensuring drinking water is boiled/purified and food is stored hygienically to prevent diseases like cholera. [3, 9] ## 4. Immunity and Vaccination * Immunity: The natural or developed ability of the body to resist and fight off infections. * Vaccination: The process of introducing a weakened or harmless form of a germ into the body. This trains the immune system to recognize and fight the germ in the future. [3] ## 5. Habits for a Healthy Lifestyle Our daily choices directly impact our well-being. To maintain ultimate health, you should follow these key habits: [2, 5, 11] * Eat a Balanced Diet: Consume plenty of fruits, vegetables, and whole grains while avoiding processed, sugary, and fatty foods. * Stay Physically Active: Exercise, walk, cycle, or play outdoor sports daily. Limit screen time. * Get Adequate Rest: Sleep for 7–8 hours every night to help your body and mind recover. * Manage Stress: Practice yoga, simple breathing exercises (pranayama), and spend quality time with family and friends. * Say NO to Harmful Substances: Completely avoid addictive and harmful substances like tobacco, alcohol, and drugs. * Keep the Environment Clean: Ensure your surroundings are hygienic and free of pollution to reduce the risk of illness.

Chapter 1 Vocabulary Investment Any asset you put money into with the expectation that it will generate income or increase in value. ⸻ Portfolio A collection of different investments owned by an investor. ⸻ Return The reward earned from an investment through income and/or an increase in value. ⸻ Income Money earned from an investment, such as interest, dividends, or rent. ⸻ Capital Gain The increase in the value of an investment when it is sold for more than its purchase price. ⸻ Security A financial investment issued by a business, government, or organization that represents a financial claim. ⸻ Property A real asset that is generally less liquid than a security. ⸻ Real Property Land, buildings, and anything permanently attached to the land. ⸻ Tangible Personal Property Physical assets such as gold, artwork, antiques, jewelry, and collectibles. ⸻ Liquidity The ability to quickly buy or sell an investment without losing much of its value. ⸻ Direct Investment An investment in which the investor directly owns the asset. Example: Buying shares of stock yourself. ⸻ Indirect Investment An investment in which ownership is obtained through a professional investment manager. Example: Investing in a mutual fund. ⸻ Debt Security An investment in which the investor lends money and receives interest plus repayment of the loan. Example: Bonds. ⸻ Bond A debt security that pays interest and returns the principal at maturity. ⸻ Equity Security An investment that represents ownership in a business. Example: Common stock. ⸻ Common Stock A security that represents ownership in a corporation and may provide dividends and capital gains. ⸻ Preferred Stock A type of stock that pays fixed dividends but usually has no voting rights. ⸻ Derivative Security A financial security whose value comes from another underlying asset. ⸻ Option A derivative that gives the holder the right to buy or sell an asset at a specific price before a certain date. ⸻ Futures Contract A legally binding agreement to buy or sell an asset at a specified price on a future date. ⸻ Risk The uncertainty about the return an investment will earn. ⸻ Low-Risk Investment An investment with more predictable returns but generally lower average returns. ⸻ High-Risk Investment An investment with less predictable returns but higher potential returns. ⸻ Diversification Owning different types of investments to reduce overall investment risk. ⸻ Short-Term Investment An investment with a maturity of one year or less. ⸻ Long-Term Investment An investment with a maturity of more than one year. ⸻ Domestic Investment An investment issued by companies or governments within your own country. ⸻ Foreign Investment An investment issued by companies or governments outside your own country. ⸻ Financial Institution An organization that pools money from investors and makes loans or investments. Examples: * Banks * Insurance companies * Mutual funds ⸻ Financial Market A marketplace where buyers and sellers trade financial assets. Examples: * Stock market * Bond market ⸻ Individual Investor A person who manages and invests their own money. ⸻ Institutional Investor A professional organization that invests money on behalf of others. Examples: * Banks * Mutual funds * Pension funds * Hedge funds ⸻ Short-Term Investments Investments that mature in one year or less and have low risk. ⸻ Treasury Bill (T-Bill) A short-term U.S. government security sold at a discount and considered virtually risk-free. ⸻ Fixed-Income Security An investment that provides regular interest or dividend payments. Examples: * Bonds * Preferred stock ⸻ Mutual Fund A professionally managed investment that pools money from many investors to buy a diversified portfolio. ⸻ Exchange-Traded Fund (ETF) A diversified investment fund that trades on a stock exchange like a stock. ⸻ Hedge Fund A privately managed investment fund with higher minimum investments and greater risk than mutual funds. ⸻ Real Estate Land and buildings purchased as investments to earn rental income or increase in value. ⸻ Tangibles Physical investment assets other than real estate. Examples: * Gold * Silver * Artwork * Collectibles ⸻ Investment Horizon The length of time an investor expects to keep an investment before selling it. ⸻ Dividend A payment made by a corporation to its shareholders from company profits. ⸻ Capital Appreciation An increase in the value of an investment over time.

12 Uncertainty & Role of Confidence

statistics: 4.2 STANDARD ERROR AND CONFIDENCE INTERVAL

Deep Sea Crinoid Anatomy Diagram | Quizlet

Henry vii councils and the court touchmyass

Cell cycle is a 4-stage process that takes place in a cell as the cell grows and divides. Each complete cell division will result in two daughter cells. The four stages of cell division are Gap 1 ( G₁ phase ), Synthesis (S phase), Gap 2 ( G₂ phase ) and mitosis. Figure 3 Figure 3 - The G₁, S and G₂ phases are also known as interphase. The process of mitosis and cytokinesis are also called M phase. Stages of cell division Mitosis Mitosis is a process where a single cell divides to form two new identical daughter cells. The two daughter cells contain the same number of chromosomes and genetic content as their parent cell. Mitosis can be divided into 4 phases: Prophase Metaphase Anaphase Telophase Figure 4 Figure 4 - 1. During prophase, chromatin condenses and becomes tightly coiled to form chromosome structure. Each chromosome consists of two sister chromatids joined together at the centromere. At the end of prophase, nucleolus disappear and nuclear membrane disintegrates. Figure 5 Figure 5 - 2. Metaphase follows after prophase. Centrioles migrate to the opposite poles of the cell. The mitotic spindle/spindle fibres are fully formed. All the chromosomes are lined up randomly at the metaphase/equatorial plate. Metaphase ends when the centromeres divide. Figure 6 Figure 6 - 3. Anaphase begins when the sister chromatids separate at the centromere. Shortening of the spindle fibres pull the sister chromatids apart to the opposite poles. The separated chromatids are referred to as daughter chromosomes. Anaphase ends when the chromosomes reach the poles of the cell. Figure 7 Figure 7 - 4. Telophase begins when the sets of chromosomes reach the opposite poles of the cell respectively. The chromosomes then start to uncoil to become their original fine chromatin threads again. Nucleoli and nuclear membrane are reformed. Spindle fibres disappear and the process of mitosis is now complete. Cytokinesis follows after the telophase stage. The Differences between Mitosis and Cytokinesis in Animal and Plant Cells In plant cells, the spindle fibres form even though they do not have centrioles. The differences in the cytokinesis process in animal and plant cells can be seen in the figures below. Figure 8 Figure 8 - 1. In animal cells, the microfilaments in the cytoplasm contract pull a ring of plasma membrane inwards. The cytoplasm is constricted in the middle of the cell between two nuclei. Figure 9 Figure 9 - 2. The formation of cleavage furrow pinches at the equator of the cell. Figure 10 Figure 10 - 3. The cleavage furrow deepens progressively until the cell separates, forming two daughter cells. Figure 11 Figure 11 - 1. In plant cells, membrane-enclosed vesicles form and gather at the equator of the cell. Figure 12 Figure 12. - 2. The vesicles join together to form a cell plate. Figure 13 Figure 13 - 3. The cell plate divides the cell into two daughter cells. Cellulose produced by the cell strengthens the newly formed cell wall. The Necessity of Mitosis Controlled mitosis is important because the genetic information carried by the chromosomes is necessary for proper functioning of an organism. Mitosis is important in cell repair and regeneration. Here are some examples where mitosis plays an important role: Lizards grow new tail if their tails break Starfish replaces lost arms by mitosis Liver cells divide to replace damaged and injured tissues Stem cells culture to produce meats Animal cloning (Dolly, the sheep)

CompTIA Network+ (N10-009) (Concise) (Personal) (Continuously Editing)

Module 6: Confidence Intervals and Hypothesis Testing

Les conciles

President's Council and Principal's Core Group

she said she was coiny

Chapitre 1 2. Platon Greek philosopher who believed the best society is ruled by wise and educated leaders (“philosopher-kings”). 3. Polis An independent Greek city-state with its own government and laws. 4. Aristote Greek philosopher who believed government should work for the common good and serve its citizens. 6. Aristocratie A government ruled by a small group of noble or privileged people. 7. Oligarchie A government controlled by a small group of powerful or wealthy people. 11. Bureaucratie A system where government decisions are carried out by officials and administrators. 12. Pouvoir exécutif The branch of government that enforces laws and runs the country day-to-day. 13. Parlement An elected group of representatives that makes laws. 14. Gouvernement autoritaire A government where one leader or small group holds most of the power and limits freedoms. 15. Pouvoir législatif The branch of government responsible for creating laws. 17. Pouvoir judiciaire The branch of government that interprets laws and operates the courts. 20. Nationalisme Strong pride in and loyalty to one’s nation, culture, and people. 21. Hobbes Believed people are naturally selfish and need a strong government to maintain order and security. 22. Locke Believed all people have natural rights (life, liberty, and property) that governments must protect. 23. Rousseau Believed political power comes from the people and governments should follow the “general will” of society. 25. Constitutionnalisme The principle that government power is limited by a constitution and laws. 26. Adam Smith Father of capitalism; believed free markets and competition create wealth and prosperity. 30. Marx Believed capitalism creates inequality because the rich control production; supported a classless society. 31. La bourgeoisie In Marxism, the wealthy class that owns businesses and the means of production. 37. Monarchie héréditaire A monarchy where power passes from one family member to another through inheritance. 38. Magna Carta A document signed in 1215 that limited the king’s power and established that everyone must follow the law. 40. Rapatrié The return of people, cultural objects, or remains to their country or homeland. 41. Représentation proportionnelle An electoral system where parties receive seats in proportion to the percentage of votes they earn. ⸻ Chapitre 1 (suite) 43. Coup d’État The sudden and often illegal removal of a government from power. 45. Totalitarisme A system where the government controls nearly every aspect of society, politics, and daily life. 48. Référendum A direct vote by citizens to accept or reject a law or political proposal. 49. Organisation non gouvernementale (ONG) An independent organization that works on social, humanitarian, or international issues without being controlled by a government. ⸻ Chapitre 2 1. Idéologie politique A set of beliefs and values about how government and society should function. 2. Libéralisme An ideology that values individual rights, freedom, democracy, and equality before the law. 3. Conservatisme An ideology that values tradition, stability, and gradual change rather than rapid reform. 4. Échiquier politique A spectrum used to compare political beliefs, usually from left to right. 5. Centriste A person whose political views are moderate and fall between the left and right. 7. Libertarianisme The belief that people should have maximum personal freedom and government should have very limited power. 11. Égalitariste A person who believes everyone should have equal rights, opportunities, and treatment. 12. Utilitarisme The idea that decisions should create the greatest happiness or benefit for the greatest number of people. 16. Syndicats Organizations that represent workers and protect their rights, wages, and working conditions. 17. Totalitarisme A political system where the state has complete control over society and citizens. 18. Anarchisme The belief that society can function without a government or centralized authority. 19. Communisme A system where property and resources are collectively owned and social classes no longer exist. 21. Socialisme An economic and political system where important industries are owned or controlled by society or the government to reduce inequality. 23. Syndicalisation The process of joining or creating a labour union. 24. Socialisme démocratique An ideology that supports democracy while using government policies to reduce economic inequality. 28. Adam Smith Believed economic freedom, competition, and free trade benefit society. 29. Capitalisme An economic system based on private ownership, profit, competition, and free markets. ⸻ Chapitre 2 (suite) 30. Mercantilisme The belief that a country becomes richer by controlling trade and exporting more than it imports. 31. Laisser-faire An economic idea that government should interfere as little as possible in the economy. 32. Fascisme An extreme authoritarian ideology that promotes nationalism, obedience to the state, and strong centralized power. 36. Libre-échange Trade between countries with few or no tariffs, taxes, or restrictions. 37. Privatisation The transfer of a government-owned business or service to private ownership. 41. Nationaliser To transfer a private company or industry into government ownership. 46. Féminisme A movement and ideology that seeks equal rights and opportunities for all genders. 47. Mouvement social A group of people working together to create social or political change. 51. Écologisme A movement and ideology focused on protecting the environment and promoting sustainability. 54. Justice sociale Chapitre 3 1. Désobéissance civile The peaceful and deliberate breaking of a law to protest something considered unjust. 2. Religion civile Shared beliefs, symbols, and values that unite a nation and create a sense of national identity. 3. Religion d’État A religion that is officially recognized and supported by a government. 4. Diaspora A group of people living outside their ancestral homeland while maintaining ties to their culture. 5. L’Holocauste The genocide of approximately six million Jews by Nazi Germany during World War II. 6. Djihad In Islam, a struggle or effort in the service of God; it can refer to a personal spiritual struggle or, in some cases, armed defense of the faith. 7. Théocratie A form of government where religious leaders rule and religious law guides the state. 8. Suffrage The right to vote in elections. 9. Siècle des Lumières An intellectual movement of the 17th and 18th centuries that emphasized reason, science, and individual rights. 10. La séparation de l’Église et de l’État The principle that government and religious institutions should remain independent from one another. 11. Dogme A principle or belief accepted as unquestionably true by a religion or ideology. 12. Fondamentalisme A movement that seeks a strict return to the original principles of a religion. 13. Démographie The study of populations, including their size, growth, and characteristics. 14. Sionisme A political movement supporting the creation and preservation of a Jewish homeland in Israel. The idea that society should be fair and provide equal rights, opportunities, and access to resources.

bio Genetics is the study of heredity and how traits are passed from parents to offspring. Gregor Mendel is known as the “Father of Genetics.” Why did Mendel use pea plants? * Easy to grow * Short generation time * Many visible traits * Can self-pollinate or cross-pollinate * Produce many offspring Examples of traits studied: * Flower colour * Seed shape * Plant height ⸻ VOCABULARY Gene * A segment of DNA that controls a trait. Allele * Different forms of the same gene. Example: P = purple flowers p = white flowers Dominant Allele * Expressed whenever it is present. * Represented by a capital letter. Example: P = purple Recessive Allele * Only expressed when two copies are present. * Represented by a lowercase letter. Example: p = white Genotype * Genetic makeup of an organism. Examples: PP Pp pp Phenotype * Physical appearance of an organism. Examples: Purple flower White flower Homozygous * Two identical alleles. Examples: PP pp Heterozygous * Two different alleles. Example: Pp Pure Breeding * Homozygous for a trait. Gamete * Sex cell (sperm or egg). ⸻ MENDEL’S LAWS Law of Dominance * A dominant allele masks a recessive allele. Example: Pp = Purple flower Law of Segregation * Alleles separate during gamete formation. * Each gamete receives only one allele. Example: Parent = Pp Gametes: P p Law of Independent Assortment * Different genes assort independently during meiosis. ⸻ MONOHYBRID CROSSES A monohybrid cross studies one trait. Example: P = Purple p = White Cross: Pp × Pp Punnett Square INCOMPLETE DOMINANCE Neither allele completely dominates. Example: Snapdragons RR = Red WW = White RW = Pink Cross: RW × RW Genotype Ratio: 1 RR : 2 RW : 1 WW Phenotype Ratio: 1 Red : 2 Pink : 1 White CODOMINANCE Both alleles are expressed equally. Example: AB Blood Type Genotype: IAIB Phenotype: AB MULTIPLE ALLELES More than two alleles exist in a population. Example: ABO Blood Group Alleles: IA IB i BLOOD TYPES Type A Genotypes: IAIA or IAi Type B Genotypes: IBIB or IBi Type AB Genotype: IAIB Type O Genotype: ii Can Type A and Type B Parents Have a Type O Child? Yes. If: Father = IAi Mother = IBi Possible Blood Types: AB A B O CELL CYCLE Purpose: * Growth * Repair * Replacement of cells Stages: G1 S G2 Mitosis Cytokinesis INTERPHASE G1 Phase Cell grows and carries out normal functions. S Phase DNA replication occurs. G2 Phase Cell prepares for division. MITOSIS Purpose: Growth and repair. Produces: 2 genetically identical diploid cells. PROPHASE Events: * Chromosomes condense * Nuclear membrane disappears * Nucleolus disappears * Spindle fibres form METAPHASE Events: * Chromosomes line up at the equator ANAPHASE Events: * Sister chromatids separate TELOPHASE Events: * Nuclear membranes reform * Chromosomes uncoil CYTOKINESIS Division of the cytoplasm. Animal Cells: Cleavage furrow forms. Plant Cells: Cell plate forms. CHROMOSOME STRUCTURE Chromosome consists of: * Two sister chromatids * One centromere DIPLOID VS HAPLOID Diploid (2n) * Two sets of chromosomes * Human body cells * 46 chromosomes Haploid (n) * One set of chromosomes * Human gametes * 23 chromosomes HOMOLOGOUS CHROMOSOMES Chromosome pairs that: * Carry the same genes * One comes from the mother * One comes from the father Humans have 23 homologous pairs. MEIOSIS Purpose: Produce gametes. Produces: 4 genetically unique haploid cells. MEIOSIS I Separates homologous chromosomes. CROSSING OVER Occurs during Prophase I. Definition: Exchange of DNA between homologous chromosomes. Importance: Creates genetic variation. RANDOM ASSORTMENT Occurs during Metaphase I. Definition: Homologous pairs line up randomly. Importance: Creates unique chromosome combinations. MEIOSIS II Separates sister chromatids. MITOSIS VS MEIOSIS Mitosis * 2 cells produced * Diploid * Genetically identical * Growth and repair Meiosis * 4 cells produced * Haploid * Genetically different * Produces gametes NONDISJUNCTION Failure of chromosomes to separate properly during meiosis. Can result in extra or missing chromosomes. DOWN SYNDROME Cause: Extra chromosome 21. Chromosome Number: 47 Usually caused by nondisjunction during meiosis. DNA DNA = Deoxyribonucleic Acid Shape: Double Helix Function: Stores genetic information. NUCLEOTIDE Three Components: * Phosphate Group * Deoxyribose Sugar * Nitrogenous Base NITROGENOUS BASES Adenine (A) Thymine (T) Cytosine (C) Guanine (G) COMPLEMENTARY BASE PAIRING A pairs with T C pairs with G DNA REPLICATION Purpose: Make identical copies of DNA. Location: Nucleus Result: Two identical DNA molecules. TRANSCRIPTION Purpose: Create mRNA from DNA. Location: Nucleus DNA → mRNA Remember: RNA uses Uracil (U) instead of Thymine (T). TRANSLATION Purpose: Make proteins. Location: Ribosome mRNA is read and amino acids are joined together to form a protein. MUTATIONS A mutation is a change in DNA sequence. Types: * Deletion * Duplication * Inversion * Translocation DELETION DNA segment removed. DUPLICATION DNA segment repeated. INVERSION DNA segment reversed. TRANSLOCATION DNA segment moves to another chromosome. SEX-LINKED TRAITS Traits located on sex chromosomes. Most are located on the X chromosome. RED-GREEN COLOUR BLINDNESS Inheritance: X-linked recessive. XC = Normal Vision Xc = Colour Blind Male: XcY Colour blind boys inherit the allele from their mother because fathers pass a Y chromosome to their sons. TAY-SACHS DISEASE Cause: Missing enzyme that breaks down lipids in nerve cells. Inheritance: Autosomal recessive. Treatment: No cure currently available. SICKLE CELL ANEMIA Cause: Mutation in hemoglobin gene. Effects: * Sickle-shaped red blood cells * Reduced oxygen transport * Blocked blood vessels Inheritance: Autosomal recessive. HUNTINGTON’S DISEASE Cause: Dominant mutation. Effects: * Nervous system degeneration * Loss of motor control * Cognitive decline Inheritance: Autosomal dominant. KARYOTYPE A photograph of chromosomes arranged in pairs. Used to: * Determine sex * Detect chromosome abnormalities * Diagnose genetic disorders PEDIGREE A family tree used to track inheritance patterns. Symbols: Square = Male Circle = Female Shaded = Has trait CLONING Producing genetically identical organisms. Uses: * Research * Agriculture * Medicine * Conservation GENETIC COUNSELLING Provides information about: * Inherited disorders * Family risk * Testing options AMNIOCENTESIS Prenatal test in which amniotic fluid is sampled and fetal cells are analyzed. Can detect: * Genetic disorders * Chromosomal disorders GMOs Genetically Modified Organisms. Definition: Organisms whose DNA has been altered through biotechnology. Advantages: * Increased crop yield * Disease resistance * Pest resistance Disadvantages: * Ethical concerns * Environmental concerns DNA REPLICATION → TRANSCRIPTION → TRANSLATION DNA (Nucleus) ↓ Replication DNA Copy DNA ↓ Transcription mRNA mRNA ↓ Translation Protein Final Product: Protein RESPIRATORY SYSTEM Function: * Brings oxygen into the body * Removes carbon dioxide * Works with the circulatory system to supply cells with oxygen Why do organisms require oxygen and produce carbon dioxide? Oxygen is required for cellular respiration. Cellular Respiration: Glucose + Oxygen → Energy (ATP) + Carbon Dioxide + Water Cells use oxygen to release energy from food. Carbon dioxide is produced as a waste product and must be removed. ⸻ PATHWAY OF AIR Nasal Cavity ↓ Pharynx ↓ Larynx ↓ Trachea ↓ Bronchi ↓ Bronchioles ↓ Alveoli ⸻ NASAL CAVITY Functions: * Warms air * Moistens air * Filters air Nasal Hairs: * Trap large particles Mucus: * Traps dust and microorganisms Blood Capillaries: * Warm incoming air ⸻ PHARYNX Common passageway for: * Air * Food Also called the throat. ⸻ UVULA Functions: * Prevents food from entering nasal cavity * Helps with speech ⸻ EPIGLOTTIS Functions: * Covers trachea during swallowing * Prevents choking ⸻ LARYNX Also called the voice box. Contains vocal cords. ⸻ TRACHEA Also called the windpipe. Contains cartilage rings that prevent collapse. Lined with: * Cilia * Mucus ⸻ CILIA Tiny hair-like structures. Function: * Sweep mucus upward toward throat ⸻ BRONCHI Two branches of the trachea leading to lungs. Right Bronchus → Right Lung Left Bronchus → Left Lung ⸻ BRONCHIOLES Smaller branches inside lungs. Lead to alveoli. ⸻ ALVEOLI Tiny air sacs. Site of gas exchange. Adaptations: * Thin walls * Moist surface * Large surface area * Rich blood supply Gas Exchange: Oxygen moves: Alveoli → Blood Carbon Dioxide moves: Blood → Alveoli By diffusion. ⸻ BREATHING MECHANICS Two main muscles: 1. Diaphragm 2. Intercostal Muscles ⸻ INHALATION (INSPIRATION) Diaphragm: * Contracts * Moves downward Intercostal Muscles: * Contract * Lift ribs upward Result: * Chest cavity volume increases * Pressure decreases * Air enters lungs ⸻ EXHALATION (EXPIRATION) Diaphragm: * Relaxes * Moves upward Intercostal Muscles: * Relax Result: * Chest cavity volume decreases * Pressure increases * Air leaves lungs ⸻ MEDULLA OBLONGATA Located in the brainstem. Function: * Controls breathing rate Responds to: * Carbon dioxide levels More CO₂: * Faster breathing Less CO₂: * Slower breathing ⸻ LUNG VOLUMES Tidal Volume * Normal amount of air breathed in and out Inspiratory Reserve Volume * Extra air inhaled after normal breath Expiratory Reserve Volume * Extra air exhaled after normal breath Residual Volume * Air remaining in lungs after maximum exhalation Vital Capacity * Maximum amount of air exhaled after deepest breath Total Lung Capacity * Total amount of air lungs can hold ⸻ CIRCULATORY SYSTEM Functions: * Transport oxygen * Transport nutrients * Remove wastes * Maintain homeostasis * Transport hormones Humans have a CLOSED circulatory system. Blood remains inside vessels. ⸻ BLOOD VESSELS ARTERIES Function: * Carry blood away from heart Characteristics: * Thick walls * High pressure * Small lumen * No valves Usually oxygen-rich Exception: Pulmonary artery ⸻ VEINS Function: * Carry blood toward heart Characteristics: * Thin walls * Low pressure * Large lumen * Valves present Usually oxygen-poor Exception: Pulmonary vein ⸻ CAPILLARIES Smallest blood vessels. Functions: * Gas exchange * Nutrient exchange * Waste exchange Walls are one cell thick. ⸻ HEART STRUCTURE Blood Flow: Body ↓ Vena Cava ↓ Right Atrium ↓ Right Ventricle ↓ Pulmonary Artery ↓ Lungs ↓ Pulmonary Vein ↓ Left Atrium ↓ Left Ventricle ↓ Aorta ↓ Body ⸻ HEART CHAMBERS Right Atrium * Receives deoxygenated blood Right Ventricle * Pumps blood to lungs Left Atrium * Receives oxygenated blood Left Ventricle * Pumps blood to body ⸻ SEPTUM Wall separating left and right sides of heart. Prevents mixing of blood. ⸻ HEART VALVES Function: * Prevent backflow of blood Types: Atrioventricular (AV) Valves Pulmonary Semilunar Valve Aortic Semilunar Valve ⸻ SA NODE Sinoatrial Node Known as: * Natural pacemaker Initiates heartbeat. ⸻ AV NODE Atrioventricular Node Receives signal from SA node. Delays impulse slightly. Allows ventricles to fill before contraction. ⸻ BLOOD Components: 1. Plasma 2. Red Blood Cells 3. White Blood Cells 4. Platelets ⸻ PLASMA Liquid component of blood. Functions: * Transport nutrients * Transport hormones * Transport wastes ⸻ RED BLOOD CELLS (ERYTHROCYTES) Function: * Carry oxygen Contain: * Hemoglobin ⸻ HEMOGLOBIN Protein in red blood cells. Function: * Binds oxygen Allows oxygen transport. ⸻ WHITE BLOOD CELLS (LEUKOCYTES) Function: * Fight infection * Defend body Part of immune system. ⸻ PLATELETS Function: * Blood clotting Prevent blood loss. ⸻ BLOOD PRESSURE Force of blood against artery walls. Measured using: Sphygmomanometer Example: 120/80 120 = Systolic Pressure 80 = Diastolic Pressure ⸻ SYSTOLIC PRESSURE Pressure when heart contracts. ⸻ DIASTOLIC PRESSURE Pressure when heart relaxes. ⸻ HYPERTENSION High blood pressure. Can increase risk of: * Stroke * Heart attack * Kidney disease ⸻ STROKE VOLUME Amount of blood pumped per heartbeat. ⸻ CARDIAC OUTPUT Amount of blood pumped per minute. Formula: Cardiac Output = Heart Rate × Stroke Volume ⸻ ECG Electrocardiogram Measures electrical activity of heart. Used to detect: * Irregular heartbeat * Heart damage ⸻ PULMONARY CIRCULATION Heart → Lungs → Heart Purpose: * Oxygenate blood ⸻ SYSTEMIC CIRCULATION Heart → Body → Heart Purpose: * Deliver oxygen to tissues ⸻ HOMEOSTASIS DURING EXERCISE Body responds by: * Increasing heart rate * Increasing breathing rate * Increasing cardiac output * Redirecting blood to muscles * Sweating to cool body Purpose: Maintain stable internal conditions. ⸻ DIGESTIVE SYSTEM Functions: * Break down food * Absorb nutrients * Eliminate waste ⸻ DIGESTIVE TRACT Mouth ↓ Pharynx ↓ Esophagus ↓ Stomach ↓ Small Intestine ↓ Large Intestine ↓ Rectum ↓ Anus ⸻ MECHANICAL DIGESTION Physical breakdown of food. Examples: * Chewing * Churning ⸻ CHEMICAL DIGESTION Chemical breakdown of food using enzymes. Examples: * Amylase * Pepsin ⸻ SALIVA Functions: 1. Moistens food 2. Contains amylase Amylase begins carbohydrate digestion. ⸻ TONGUE Functions: 1. Forms bolus 2. Pushes food for swallowing ⸻ ESOPHAGUS Moves food to stomach. Uses: Peristalsis ⸻ PERISTALSIS Wave-like muscular contractions. Move food through digestive tract. ⸻ STOMACH Functions: * Stores food * Mixes food * Begins protein digestion Produces: * HCl * Pepsin * Mucus ⸻ HCl Hydrochloric Acid Functions: * Kills bacteria * Activates pepsin ⸻ PEPSIN Function: * Digests proteins ⸻ MUCUS Function: * Protects stomach lining ⸻ CHYME Semi-liquid food mixture leaving stomach. ⸻ HEARTBURN Cause: Stomach acid enters esophagus. Usually caused by weakened cardiac sphincter. ⸻ SMALL INTESTINE Main site of: * Digestion * Absorption Adaptations: * Long length * Folds * Villi * Microvilli Large surface area increases absorption. ⸻ DUODENUM First section. Functions: * Receives bile * Receives pancreatic enzymes * Most chemical digestion ⸻ JEJUNUM Main nutrient absorption. ⸻ ILEUM Final nutrient absorption. ⸻ VILLI Finger-like projections. Function: Increase surface area. ⸻ LIVER Functions: * Produces bile * Processes nutrients * Detoxifies blood ⸻ GALL BLADDER Functions: * Stores bile * Releases bile into small intestine ⸻ PANCREAS Functions: * Produces digestive enzymes * Produces bicarbonate ⸻ BILE Function: Emulsifies fats. Breaks large fat droplets into smaller droplets. Makes fat digestion easier. ⸻ DIGESTION OF CARBOHYDRATES Mouth: * Amylase begins digestion Small Intestine: * Pancreatic amylase continues digestion End Product: Glucose ⸻ DIGESTION OF PROTEINS Stomach: * Pepsin begins digestion Small Intestine: * Trypsin continues digestion End Product: Amino Acids ⸻ DIGESTION OF LIPIDS Small Intestine: * Bile emulsifies fats * Lipase digests fats End Product: Fatty Acids + Glycerol ⸻ EVOLUTION Evolution: Change in populations over time. Individuals do NOT evolve. Populations evolve. ⸻ DARWIN Proposed: Natural Selection Book: On the Origin of Species ⸻ WALLACE Independently developed theory of natural selection. ⸻ LAMARCK Proposed: Inheritance of acquired characteristics Example: Giraffes stretch necks and pass longer necks to offspring. This theory is incorrect. ⸻ NATURAL SELECTION Requirements: 1. Variation 2. Overproduction 3. Competition 4. Differential Survival 5. Reproduction Result: Adaptation ⸻ ADAPTATION Inherited characteristic that increases survival and reproduction. ⸻ SELECTIVE ADVANTAGE A characteristic that improves survival or reproduction. Example: Antibiotic resistance ⸻ SELECTIVE PRESSURE Environmental factor that influences survival. Examples: * Predators * Disease * Climate * Competition ⸻ VARIATION Differences among individuals in a population. Sources: * Mutation * Crossing Over * Random Assortment ⸻ MUTATION Ultimate source of new alleles. Creates genetic variation. ⸻ FOSSIL Preserved remains or traces of organisms. ⸻ FOSSIL RECORD Collection of fossils showing evolutionary history. Provides evidence for evolution. ⸻ RADIOACTIVE DATING Uses radioactive isotopes to determine fossil age. ⸻ UNIFORMITARIANISM Proposed by Lyell. Earth changes gradually over long periods of time. ⸻ CATASTROPHISM Proposed by Cuvier. Earth shaped by sudden catastrophic events. ⸻ BIOGEOGRAPHY Study of species distribution around Earth. Provides evidence for evolution. ⸻ EMBRYOLOGY Study of embryos. Similar embryos suggest common ancestry. ⸻ HOMOLOGOUS STRUCTURES Same evolutionary origin. Different functions. Example: Human arm Whale flipper Bat wing Evidence of common ancestry. ⸻ ANALOGOUS STRUCTURES Different origins. Same function. Example: Bird wing Insect wing Not evidence of close ancestry. ⸻ VESTIGIAL STRUCTURES Structures with little or no function. Examples: * Human appendix * Whale pelvis Evidence of evolution. ⸻ MIMICRY One species resembles another. Example: Syrphid fly resembles wasp. Provides protection. ⸻ ARTIFICIAL SELECTION Humans select traits. Examples: * Dog breeding * Crop breeding ⸻ DIRECTIONAL SELECTION One extreme phenotype favored. Graph shifts in one direction. ⸻ STABILIZING SELECTION Average phenotype favored. Extremes selected against. ⸻ DISRUPTIVE SELECTION Both extremes favored. Middle selected against. ⸻ GENETIC DRIFT Random change in allele frequencies. Most significant in small populations. ⸻ FOUNDER EFFECT Small group starts new population. Different allele frequencies from original population. ⸻ BOTTLENECK EFFECT Population drastically reduced. Loss of genetic variation. ⸻ GENE FLOW Movement of alleles between populations. Occurs through migration. ⸻ NON-RANDOM MATING Individuals choose specific mates. Can reduce variation. ⸻ SPECIES A group of organisms that can interbreed in nature and produce fertile offspring. ⸻ SPECIATION Formation of new species. ⸻ ALLOPATRIC SPECIATION Requires: Geographic isolation Example: Mountain separates populations. ⸻ SYMPATRIC SPECIATION Occurs without geographic isolation. ⸻ PRE-ZYGOTIC ISOLATION Prevents fertilization. Examples: * Different mating seasons * Different mating songs * Different habitats ⸻ POST-ZYGOTIC ISOLATION Occurs after fertilization. Example: Sterile hybrids Example: Mule DIVERSITY Prokaryotes vs Eukaryotes PROKARYOTES * No nucleus * No membrane-bound organelles * Circular DNA * Smaller * Examples: Eubacteria, Archaebacteria EUKARYOTES * Nucleus present * Membrane-bound organelles * Linear chromosomes * Larger * Examples: Protists, Fungi, Plants, Animals Three Differences: 1. Nucleus vs no nucleus 2. Organelles vs no organelles 3. Larger vs smaller ⸻ Taxonomy Kingdom Phylum Class Order Family Genus Species Mnemonic: King Philip Came Over For Good Soup ⸻ Binomial Nomenclature Genus + Species Example: Homo sapiens Rules: * Genus capitalized * Species lowercase * Italicized Purpose: * Universal naming system * Avoids confusion * Shows relationships ⸻ Dichotomous Key Used to identify organisms using paired choices. Example: 1a Has wings → Step 2 1b No wings → Step 3 ⸻ Six Kingdoms 1. Archaebacteria 2. Eubacteria 3. Protista 4. Fungi 5. Plantae 6. Animalia ⸻ VIRUSES Virus Structure: * DNA or RNA * Capsid * Attachment proteins * Sometimes envelope Why Viruses Are Not Living: * Not made of cells * Cannot reproduce independently * No metabolism * Need host cell ⸻ DNA Virus vs RNA Virus DNA Virus: * Contains DNA * More stable RNA Virus: * Contains RNA * Mutates faster ⸻ Lytic Cycle Attachment ↓ Penetration ↓ Replication ↓ Assembly ↓ Lysis Host cell bursts. ⸻ Lysogenic Cycle Attachment ↓ Penetration ↓ Integration into host DNA ↓ Host reproduces ↓ Virus DNA copied Cell survives initially. ⸻ ARCHAEBACTERIA Characteristics: * Prokaryotic * Unicellular * Extreme environments Three Groups: Methanogens * Produce methane Halophiles * Salt-loving Thermoacidophiles * Hot acidic environments ⸻ EUBACTERIA Characteristics: * Prokaryotic * Peptidoglycan cell wall * Binary fission Examples: * E. coli * Streptococcus ⸻ Binary Fission DNA Replication ↓ Cell Growth ↓ Cell Division ↓ Two Identical Cells ⸻ Conjugation DNA transfer through pilus. Importance: * Genetic variation * Antibiotic resistance ⸻ Antibiotic Resistance Mutation ↓ Antibiotic kills susceptible bacteria ↓ Resistant bacteria survive ↓ Resistant bacteria reproduce Natural Selection ⸻ PROTISTS Characteristics: * Eukaryotic * Mostly unicellular * Aquatic Three Groups: Animal-like * Amoeba * Paramecium Plant-like * Algae * Euglena Fungus-like * Slime molds ⸻ Amoeba * Uses pseudopods * Phagocytosis ⸻ Algae * Photosynthetic * Oxygen producer ⸻ Euglena * Chloroplasts * Flagellum * Photosynthesis * Can also feed heterotrophically ⸻ Malaria Cause: Plasmodium Kingdom: Protista ⸻ FUNGI Characteristics: * Eukaryotic * Heterotrophic * Chitin cell walls * Reproduce with spores Examples: * Mushrooms * Mold * Yeast ⸻ External Digestion Release enzymes ↓ Digest food outside body ↓ Absorb nutrients ⸻ Fungi vs Plants FUNGI * Heterotrophic * Chitin * No chloroplasts PLANTS * Autotrophic * Cellulose * Chloroplasts ⸻ PLANTS Biodiversity vs Monoculture BIODIVERSITY * Many species * Stable ecosystem * Disease resistance MONOCULTURE * One crop species * Low diversity * Disease risk ⸻ Bryophytes Definition: Nonvascular plants Examples: * Mosses * Liverworts Characteristics: * No xylem * No phloem * Need water for reproduction ⸻ Vascular Plants Contain: * Xylem * Phloem ⸻ Xylem Function: Water and minerals Direction: Roots → Leaves ⸻ Phloem Function: Sugars Direction: Throughout plant ⸻ Alternation of Generations Sporophyte (2n) ↓ meiosis Spores (n) ↓ Gametophyte (n) ↓ Gametes ↓ fertilization Zygote (2n) ↓ Sporophyte ⸻ Moss Life Cycle Spores ↓ Gametophyte ↓ Egg + Sperm ↓ Zygote ↓ Sporophyte ↓ Capsule ↓ Spores Know: * Capsule * Sporophyte * Gametophyte * Spores ⸻ Fern Life Cycle Fern ↓ Sori ↓ Spores ↓ Prothallus ↓ Gametes ↓ Fertilization ↓ Young Fern Know: * Frond * Sori * Sporangia * Prothallus ⸻ Gymnosperms Characteristics: * Naked seeds * Cones * Wind pollination * Evergreen Examples: * Pine * Spruce * Fir ⸻ Angiosperms Characteristics: * Flowers * Fruit * Seeds enclosed Examples: * Apple tree * Rose * Maple ⸻ Flower Structure Anther * Produces pollen Pollen Grain * Male gamete Stigma * Receives pollen Style * Connects stigma and ovary Ovary * Contains ovules Ovule * Female gamete Petals * Attract pollinators ⸻ Plant Tissues Meristematic * Growth Dermal * Protection Ground * Photosynthesis * Storage Vascular * Transport ⸻ Leaf Structure Blade * Main leaf surface Petiole * Connects leaf to stem Cuticle * Reduces water loss Palisade Mesophyll * Photosynthesis Spongy Mesophyll * Gas exchange Veins * Xylem + Phloem ⸻ Stomata Openings in leaves. Functions: * Gas exchange * Water loss ⸻ Guard Cells Control opening and closing of stomata. ⸻ Transpiration Water loss from leaves. Functions: * Pulls water upward * Cools plant * Moves minerals ⸻ Simple vs Compound Leaves Simple: * One blade Compound: * Multiple leaflets ⸻ Monocots vs Dicots MONOCOTS * 1 cotyledon * Parallel veins * Fibrous roots * Flower parts in 3s Examples: Corn Grass DICOTS * 2 cotyledons * Net veins * Taproot * Flower parts in 4s or 5s Examples: Bean Maple ⸻ Seeds Contain: * Embryo * Stored food * Seed coat Functions: * Protection * Survival * Dispersal ⸻ Seed Dispersal Wind * Dandelion Water * Coconut Animals * Burrs Explosive * Touch-me-not ⸻ Fruit vs Vegetable Fruit: * Comes from ovary * Contains seeds Examples: Tomato Apple Pepper Vegetable: * Root, stem, leaf, or flower Examples: Carrot Celery Broccoli ⸻ Factors Affecting Plant Growth 1. Light 2. Water 3. Carbon dioxide 4. Temperature 5. Soil nutrients 6. Oxygen 7. Soil pH 8. Space 9. Pollinators 10. Disease and pests

Council DDA and Refriderator.docx