Study Notes on TEAS Science Practice Questions

Intravenous Knowledge for TEAS Science Practice Questions

Table of Contents

  • Organization of the Human Body
  • Cardiovascular System
  • Respiratory System
  • Neurological System
  • Gastrointestinal System
  • Muscular System
  • Reproductive System
  • Integumentary System
  • Endocrine System
  • Urinary System
  • Lymphatic - Immune System
  • Skeletal System
  • Biological Hierarchy of the Body
  • Mitosis vs. Meiosis
  • Genetics and DNA
  • Basic Macromolecules
  • Micro-Organisms and Microscopes
  • Basic Atomic Structures
  • Periodic Table
  • Physical Properties and States of Matter
  • Chemical Reactions
  • Conditions that Affect Chemical Reactions
  • Properties of Solutions
  • Acids and Bases
  • Scientific Measurement and Tools
  • Scientific Explanation and Drawing Conclusions
  • Predicting Relationships Among Events, Objects, and Processes
  • Identifying Hypothesis
Organization of the Human Body

  1. Which term describes a position nearer to the front of the body?

    • Correct Answer: B) Ventral
    • Rationale: The term "ventral" refers to the front or belly side of the body. The opposite term is "dorsal," which refers to the backside.

  2. The elbow is _____ to the wrist.

    • Correct Answer: A) Proximal
    • Rationale: "Proximal" indicates a position closer to the trunk or to a reference point. In this case, the elbow is closer to the shoulder than the wrist.

  3. The term "superior" is best described as:

    • Correct Answer: C) Closer to the head
    • Rationale: The term "superior" denotes a position that is closer to the head. Conversely, "inferior" indicates a position farther from the head.

  4. Which term is used to describe a structure closer to the body's surface?

    • Correct Answer: A) Superficial
    • Rationale: "Superficial" refers to a position that is closer to the body surface, whereas "deep" refers to structures that are more internal.

  5. If a surgeon makes an incision along the midline of the body, it's referred to as:

    • Correct Answer: A) Sagittal
    • Rationale: A sagittal incision divides the body into left and right.

  6. The sternum is _____ to the heart.

    • Correct Answer: A) Anterior
    • Rationale: The sternum, or breastbone, is located in front of (anterior to) the heart.

  7. The anatomical term for the back of the knee is:

    • Correct Answer: C) Popliteal
    • Rationale: The term "popliteal" refers to the area behind the knee.

  8. Which of the following is a medial structure?

    • Correct Answer: C) Tibia
    • Rationale: The tibia is a medial bone in the lower leg as compared to the fibula, which is lateral.

  9. The anatomical position is characterized by all the following EXCEPT:

    • Correct Answer: D) Head tilted backward
    • Rationale: In the anatomical position, the body stands erect with feet flat, arms at sides, palms forward, and head looking forward (not tilted).

  10. Which term refers to the outermost layer of a structure?

    • Correct Answer: D) Superficial
    • Rationale: "Superficial" refers to structures closer to the external body surface.
Cardiovascular System

  1. The heart is enclosed in a double-layered sac called the:

    • Correct Answer: C) Pericardium
    • Rationale: The pericardium is a double-layered membrane surrounding the heart.

  2. Which layer of the heart is responsible for its pumping action?

    • Correct Answer: A) Myocardium
    • Rationale: The myocardium is the muscular layer of the heart responsible for contraction and pumping blood.

  3. Blood flows from the left atrium into the left ventricle through which valve?

    • Correct Answer: C) Mitral (bicuspid) valve
    • Rationale: The mitral valve allows for blood to flow from the left atrium to the left ventricle.

  4. Which vessels deliver oxygen-rich blood from the lungs to the heart?

    • Correct Answer: B) Pulmonary veins
    • Rationale: Pulmonary veins carry oxygenated blood from the lungs to the left atrium of the heart.

  5. The valve located between the right atrium and right ventricle is:

    • Correct Answer: A) Tricuspid valve
    • Rationale: The tricuspid valve is positioned between the right atrium and right ventricle.

  6. The structure responsible for initiating the heartbeat is:

    • Correct Answer: D) Sinoatrial node
    • Rationale: The sinoatrial (SA) node acts as the natural pacemaker of the heart and initiates the heartbeat.
Respiratory System

  1. Which structure serves as a common pathway for both air and food?

    • Correct Answer: C) Pharynx
    • Rationale: The pharynx is a joint passage for air (respiratory) and food (digestive) systems.

  2. The primary site of gas exchange in the lungs is the:

    • Correct Answer: B) Alveoli
    • Rationale: Alveoli are tiny sacs for gas exchange between air and blood.

  3. The conducting zones of the respiratory system include all of the following EXCEPT:

    • Correct Answer: C) Alveoli
    • Rationale: The conducting zones transport air but do not perform gas exchange (which occurs in the alveoli).

  4. The diaphragm contracts during:

    • Correct Answer: B) Inhalation
    • Rationale: Contracting the diaphragm increases thoracic volume and draws air into the lungs.

  5. What does "ventilation" mean in the context of the respiratory system?

    • Correct Answer: B) The mechanical process of moving air in and out of the lungs
    • Rationale: Ventilation is directly related to breathing mechanisms.
Neurological System

  1. Which lobe of the brain is primarily responsible for visual processing?

    • Correct Answer: D) Occipital lobe
    • Rationale: The occipital lobe is the area for processing visual information.

  2. The structure that ensures communication between the two hemispheres of the brain is the:

    • Correct Answer: C) Corpus callosum
    • Rationale: The corpus callosum connects left and right hemispheres and facilitates communication.

  3. Which part of the brain plays a critical role in coordinating motor movements and maintaining balance?

    • Correct Answer: C) Cerebellum
    • Rationale: The cerebellum coordinates movement and balance.
Gastrointestinal System

  1. Which enzyme is responsible for breaking down carbohydrates in the mouth?

    • Correct Answer: B) Amylase
    • Rationale: Amylase begins the digestion of carbohydrates.

  2. The process by which digested nutrients pass into the blood vessels in the wall of the intestine is called:

    • Correct Answer: C) Absorption
    • Rationale: Absorption is the stage in which nutrients enter the bloodstream.
Muscular System

  1. Which type of muscle tissue is striated and involuntary?

    • Correct Answer: B) Cardiac muscle
    • Rationale: Cardiac muscle is found in the heart and operates involuntarily.

  2. The primary function of the trapezius muscle is to:

    • Correct Answer: B) Move and stabilize the scapula
    • Rationale: The trapezius is responsible for movements of the shoulders and neck.
Reproductive System

  1. The primary function of the fallopian tubes is to:

    • Correct Answer: C) Transport eggs to the uterus
    • Rationale: The fallopian tubes connect the ovaries to the uterus and transport eggs.

  2. Which external male reproductive organ serves as the urinary excretory duct?

    • Correct Answer: D) Penis
    • Rationale: The penis serves dual functions of reproduction and urine excretion.
Integumentary System

  1. Which is the outermost layer of the skin?

    • Correct Answer: C) Epidermis
    • Rationale: The epidermis is the outer layer, providing protection.

  2. Which cells produce melanin?

    • Correct Answer: B) Melanocytes
    • Rationale: Melanocytes are responsible for producing the skin's pigment.
Endocrine System
  1. Which gland is the primary link between the nervous and endocrine systems?
    • Correct Answer: C) Hypothalamus
    • Rationale: The hypothalamus plays a crucial coordinating role in hormonal regulation.
Urinary System
  1. Which structure serves as the functional unit of the kidney?
    • Correct Answer: C) Nephron
    • Rationale: Nephrons are the microscopic structures in the kidney responsible for filtration and urine production.
Lymphatic System
  1. Which structure serves as a site for the maturation of T lymphocytes?
    • Correct Answer: B) Thymus
    • Rationale: The thymus is key for T cell maturation.
Skeletal System
  1. Which bone forms the forehead?
    • Correct Answer: D) Frontal
    • Rationale: The frontal bone comprises the forehead.
Biological Hierarchy of the Body
  1. Which is the most specific level of biological hierarchy?
    • Correct Answer: D) Species
    • Rationale: The species level is the most specific classification of organisms.
Mitosis vs. Meiosis
  1. What is the primary difference between mitosis and meiosis?
    • Correct Answer: B) Mitosis produces two diploid daughter cells; meiosis produces four haploid daughter cells.
    • Rationale: Meiosis includes two rounds of division, resulting in four non-identical cells.
Genetics and DNA
  1. How many chromosomes are typically found in a human body cell?
    • Correct Answer: B) 46
    • Rationale: A human somatic cell typically contains 46 chromosomes.
Basic Macromolecules
  1. Which of the following is a monosaccharide?
    • Correct Answer: D) Glucose
    • Rationale: Glucose is a simple sugar.
Micro-Organisms and Microscopes
  1. Which micro-organism is considered not a living entity?
    • Correct Answer: D) Viruses
    • Rationale: Viruses cannot reproduce on their own; they require a host to replicate.
Basic Atomic Structures
  1. What does the atomic number represent?
    • Correct Answer: C) Number of protons
    • Rationale: The atomic number is determined by the number of protons in the nucleus.
Periodic Table
  1. What are the horizontal rows in the periodic table called?
    • Correct Answer: D) Periods
    • Rationale: Periods represent rows in the periodic table, organized by increasing atomic number.
Physical Properties and States of Matter
  1. What is the property describing the amount of matter in an object?
    • Correct Answer: C) Mass
    • Rationale: Mass refers to the amount of matter present in an object.
Chemical Reactions
  1. What term describes substances present before a chemical reaction occurs?
    • Correct Answer: C) Reactants
    • Rationale: Reactants are involved in chemical reactions, undergoing transformation to form products.