Human Bio final

What are the steps of the scientific method?

An approach utilized for investigating phenomena systematically, involving a sequence that begins with making observations, formulating explanations, experimenting to test these explanations, and ultimately analyzing the resulting data to reach conclusions.

What are the properties of protons?

Fundamental particles located within the nucleus of an atom, known for their positive charge which is critical in determining the identity of the atom.

What charge do neutrons have and where are they located?

Neutral particles that exist within the nucleus, contributing to the overall mass of an atom without affecting its charge.

What is the function of electrons in an atom?

Particles with a negative charge that occupy various energy levels around the nucleus; they are essential for forming bonds and maintaining atom stability.

What are covalent bonds and which elements can form them?

Chemical connections resulting from the sharing of pairs of electrons between atoms, commonly occurring with certain nonmetals.

How do hydrogen bonds compare to covalent and ionic bonds?

Weaker interactions that occur between molecules or different parts of a large molecule, differing from strong connections formed by shared electrons or those created by transferring electrons.

What distinguishes acids from bases on the pH scale?

A range that categorizes substances based on the concentration of hydrogen ions, where certain substances fall into various categories depending on their measured value.

What do dehydration reactions accomplish?

Processes that promote the synthesis of larger molecules by removing water, allowing smaller units to bind together.

How do hydrolysis reactions function?

Reactions that disassemble complex molecules by adding water, resulting in the separation of the larger structure into its components.

What are the monomers for proteins?

The basic units that combine to form proteins, each possessing unique characteristics that influence the protein's overall function.

What is denaturation in proteins?

A process resulting in the loss of a protein's natural structure due to disruption of bonds, leading to a loss of its functional capabilities.

What defines diffusion?

The movement of molecules from an area of higher concentration to an area of lower concentration, driven by random motion.

What occurs during osmosis?

A specific form of diffusion that involves the movement of water across a membrane in relation to solute concentration.

What happens to cells in a hypertonic solution?

Cells experience a loss of water and may decrease in size when placed in an environment with a higher concentration of solutes compared to the cell's interior.

What is the role of ribosomes in a cell?

Cellular structures responsible for the synthesis of proteins by translating genetic instructions into polypeptides.

What are the functions of the Golgi apparatus?

An essential organelle that processes and packages proteins for distribution to different locations within or outside the cell.

What is the difference between aerobic and anaerobic respiration?

Two types of biological energy production, with one requiring oxygen and the other occurring without it.

What is the outcome of glycolysis?

A metabolic pathway that processes glucose in the cytoplasm and results in the production of several key energy carriers and products.

What role does oxygen play during cellular respiration?

A crucial component that serves as the final acceptor in the electron transport chain, allowing the efficient production of energy.

Contrast autosomes to sex chromosomes.

One type consists of pairs that carry genes unrelated to sex, while the other pair is responsible for determining an individual's biological sex.

What happens during prophase of mitosis?

The stage where chromatin condenses into visible chromosomes and structures necessary for separating chromosomes begin to form.

What is cytokinesis?

A phase that follows the division of genetic material, involving the separation of the cytoplasm into two distinct cells.

What is crossing over in meiosis?

An exchange of genetic material between homologous chromosomes that enhances genetic diversity during gamete formation.

What is a characteristic feature of cancerous cells?

Cells that exhibit uncontrolled proliferation and often lack normal features of differentiation and regulation.

What do dominant alleles do?

Genetic factors that can overpower the effects of other alleles, thereby influencing the expressed characteristics.

What is a pedigree chart used for?

A diagram that displays the inheritance of traits across generations within a family, assisting in understanding genetic relationships.

What is the structure of DNA compared to RNA?

A molecular structure characterized by its strands and sugar types, with distinct base compositions that serve specific functions.

What are the main parts of a neuron?

Key components that include extensions for receiving inputs, a central part for processing information, and a filament for transmitting signals.

What triggers depolarization in neurons?

The opening of specific channels allowing certain ions to flow into the cell, leading to a change in the electrical potential across the membrane.

What is the role of the cerebral cortex?

The outer layer of the brain involved in numerous higher-level processes including sensory perception and voluntary motor control.

What is the function of the hypothalamus?

A brain region that plays a critical role in regulating various homeostatic processes essential for bodily function.

What are the types of sensory receptors?

Specialized cells that respond to various types of stimuli, categorized based on the nature of the stimuli they detect.

What are the three muscle types?

Categories of muscle tissue differentiated by their structure, control, and function within the body.

Compare mechanical and chemical digestion.

Two processes that together break down food into usable forms, with one involving physical alteration while the other entails chemical changes.

What role does the pancreas play in digestion?

An organ that produces and secretes a variety of enzymes that aid in the digestion of macro-nutrients in the small intestine.

What is the primary function of the alveoli in the lungs?

Tiny structures in the respiratory system that facilitate the exchange of gases between the air and the bloodstream.

How does the heart circulate blood?

The process through which oxygen-rich blood is pumped through the body and returned via a network of vessels.

What is the difference between systolic and diastolic pressure?

Two measurements used to assess blood pressure, highlighting the differences in blood vessel pressure during heart contractions and rest.

What are the main components of the immune system?

A complex network of cells and tissues primarily focused on defending the body against infections and other diseases.

What does innate immunity involve?

The body's immediate and nonspecific response system aimed at combating pathogens without previous exposure.

What is the function of helper T-cells?

A type of immune cell that facilitates the activity of other immune cells through the release of signaling molecules.

Describe the structure of bacteria.

Simple organisms characterized by the absence of a nucleus and typically featuring various structures that aid in their survival and replication.

What are the defining features of the ABO blood groups?

A classification system based on specific surface molecules present on red blood cells, significant in transfusion medicine.

What is artificial selection in the context of evolution?

A selective breeding process directed by humans aimed at promoting specific traits in plants and animals.

What are homologous structures?

Anatomical features in different organisms that share a similar origin, reflecting common ancestry despite differing functions.

What is the role of the foramen ovale in fetal circulation?

An opening in the fetal heart that enables blood to circumvent the lungs, allowing for efficient circulation during development