Anatomy & Physiology Question Bank
1. Which statement best describes homeostasis?
A. Maintaining all internal conditions at exactly the same value
B. Maintaining a relatively stable internal environment despite changes
C. Preventing all changes in body temperature
D. Keeping the external environment constant
Answer: B. Maintaining a relatively stable internal environment despite changes.
Explanation: Homeostasis keeps variables such as body temperature, blood glucose, and
fluid balance within appropriate ranges. These variables can fluctuate rather than remain
perfectly constant.
2. Which organelle produces most of the ATP used by a typical human cell?
A. Golgi apparatus
B. Lysosome
C. Mitochondrion
D. Nucleolus
Answer: C. Mitochondrion.
3. A person withdraws their hand after touching a hot surface before consciously
recognizing the pain. Which structure is primarily responsible for integrating this
rapid reflex?
A. Cerebral cortex
B. Spinal cord
C. Cerebellum
D. Hypothalamus
Answer: B. Spinal cord.
Explanation: A spinal reflex can be integrated within the spinal cord, allowing a rapid
response without waiting for conscious processing by the brain. The brain receives sensory
information as well.
4. Which type of tissue lines the alveoli of the lungs and supports rapid gas
exchange?
A. Simple squamous epithelium
B. Stratified squamous epithelium
C. Dense regular connective tissue
D. Transitional epithelium
Answer: A. Simple squamous epithelium.
,5. True or false: The pulmonary arteries carry oxygen-poor blood away from the heart
toward the lungs.
Answer: True.
6. What is the primary function of red blood cells?
Answer: To transport oxygen, mainly through hemoglobin, and to contribute to carbon
dioxide transport.
7. Which hormone lowers blood glucose by promoting glucose uptake by many cells
and storage of nutrients?
A. Glucagon
B. Insulin
C. Aldosterone
D. Melatonin
Answer: B. Insulin.
8. A patient has a reduced number of platelets. Which physiological process is most
directly affected?
A. Oxygen transport
B. Blood clot formation
C. Antibody production
D. Thyroid hormone secretion
Answer: B. Blood clot formation.
Explanation: Platelets help form the initial platelet plug and support the coagulation process
that stabilizes a blood clot.
9. Fill in the blank: The functional unit of the kidney responsible for filtering blood and
forming urine is the ______.
Answer: Nephron.
10. Which movement decreases the angle between two bones at a joint?
A. Extension
B. Abduction
C. Flexion
D. Circumduction
Answer: C. Flexion.
11. A student observes a cell placed in a solution with a lower solute concentration
than the fluid inside the cell. Assuming the solutes cannot cross the membrane freely,
which way will water tend to move?
,A. Out of the cell
B. Into the cell
C. Equally in both directions with no net movement
D. Water movement will stop completely
Answer: B. Into the cell.
Explanation: The surrounding hypotonic solution has a lower effective solute concentration.
Water moves into the cell by osmosis, so the cell may swell.
12. Which structure prevents most food and liquid from entering the trachea during
swallowing?
A. Epiglottis
B. Uvula
C. Soft palate
D. Vocal folds alone
Answer: A. Epiglottis.
13. True or false: Skeletal muscle is generally under voluntary control, whereas
smooth muscle commonly regulates involuntary movements of internal organs.
Answer: True.
14. Which blood vessel carries oxygenated blood from the lungs to the left atrium?
A. Pulmonary artery
B. Aorta
C. Pulmonary vein
D. Superior vena cava
Answer: C. Pulmonary vein.
15. What is the main role of the small intestine in digestion?
Answer: It completes much of chemical digestion and absorbs most nutrients.
16. A person becomes dehydrated after prolonged sweating. Which hormone helps
the kidneys conserve water by increasing water reabsorption in the collecting ducts?
A. Insulin
B. Antidiuretic hormone (ADH)
C. Calcitonin
D. Glucagon
Answer: B. Antidiuretic hormone (ADH).
Explanation: ADH increases the water permeability of parts of the kidney's collecting ducts,
helping reduce water loss in urine.
, 17. Which cells are primarily responsible for producing antibodies?
A. Activated B cells differentiated into plasma cells
B. Red blood cells
C. Platelets
D. Osteoclasts
Answer: A. Activated B cells differentiated into plasma cells.
18. Match each anatomical term to its correct meaning.
1. Superior
2. Distal
3. Medial
4. Posterior
A. Toward the back
B. Farther from the point of attachment
C. Toward the midline
D. Above or toward the head
Answer: 1–D, 2–B, 3–C, 4–A.
19. Which part of a neuron typically receives incoming signals from other neurons?
A. Dendrites
B. Myelin sheath
C. Axon terminals only
D. Node of Ranvier
Answer: A. Dendrites.
20. True or false: The left ventricle pumps blood into the pulmonary artery.
Answer: False.
Explanation: The left ventricle pumps oxygenated blood into the aorta for systemic
circulation. The right ventricle pumps blood into the pulmonary trunk.
21. What is the main function of osteoclasts in bone tissue?
A. Produce antibodies
B. Break down and resorb bone matrix
C. Form the myelin sheath
D. Store oxygen for muscles
Answer: B. Break down and resorb bone matrix.
22. Which sequence correctly traces the movement of air from the trachea to the site
of gas exchange?
1. Which statement best describes homeostasis?
A. Maintaining all internal conditions at exactly the same value
B. Maintaining a relatively stable internal environment despite changes
C. Preventing all changes in body temperature
D. Keeping the external environment constant
Answer: B. Maintaining a relatively stable internal environment despite changes.
Explanation: Homeostasis keeps variables such as body temperature, blood glucose, and
fluid balance within appropriate ranges. These variables can fluctuate rather than remain
perfectly constant.
2. Which organelle produces most of the ATP used by a typical human cell?
A. Golgi apparatus
B. Lysosome
C. Mitochondrion
D. Nucleolus
Answer: C. Mitochondrion.
3. A person withdraws their hand after touching a hot surface before consciously
recognizing the pain. Which structure is primarily responsible for integrating this
rapid reflex?
A. Cerebral cortex
B. Spinal cord
C. Cerebellum
D. Hypothalamus
Answer: B. Spinal cord.
Explanation: A spinal reflex can be integrated within the spinal cord, allowing a rapid
response without waiting for conscious processing by the brain. The brain receives sensory
information as well.
4. Which type of tissue lines the alveoli of the lungs and supports rapid gas
exchange?
A. Simple squamous epithelium
B. Stratified squamous epithelium
C. Dense regular connective tissue
D. Transitional epithelium
Answer: A. Simple squamous epithelium.
,5. True or false: The pulmonary arteries carry oxygen-poor blood away from the heart
toward the lungs.
Answer: True.
6. What is the primary function of red blood cells?
Answer: To transport oxygen, mainly through hemoglobin, and to contribute to carbon
dioxide transport.
7. Which hormone lowers blood glucose by promoting glucose uptake by many cells
and storage of nutrients?
A. Glucagon
B. Insulin
C. Aldosterone
D. Melatonin
Answer: B. Insulin.
8. A patient has a reduced number of platelets. Which physiological process is most
directly affected?
A. Oxygen transport
B. Blood clot formation
C. Antibody production
D. Thyroid hormone secretion
Answer: B. Blood clot formation.
Explanation: Platelets help form the initial platelet plug and support the coagulation process
that stabilizes a blood clot.
9. Fill in the blank: The functional unit of the kidney responsible for filtering blood and
forming urine is the ______.
Answer: Nephron.
10. Which movement decreases the angle between two bones at a joint?
A. Extension
B. Abduction
C. Flexion
D. Circumduction
Answer: C. Flexion.
11. A student observes a cell placed in a solution with a lower solute concentration
than the fluid inside the cell. Assuming the solutes cannot cross the membrane freely,
which way will water tend to move?
,A. Out of the cell
B. Into the cell
C. Equally in both directions with no net movement
D. Water movement will stop completely
Answer: B. Into the cell.
Explanation: The surrounding hypotonic solution has a lower effective solute concentration.
Water moves into the cell by osmosis, so the cell may swell.
12. Which structure prevents most food and liquid from entering the trachea during
swallowing?
A. Epiglottis
B. Uvula
C. Soft palate
D. Vocal folds alone
Answer: A. Epiglottis.
13. True or false: Skeletal muscle is generally under voluntary control, whereas
smooth muscle commonly regulates involuntary movements of internal organs.
Answer: True.
14. Which blood vessel carries oxygenated blood from the lungs to the left atrium?
A. Pulmonary artery
B. Aorta
C. Pulmonary vein
D. Superior vena cava
Answer: C. Pulmonary vein.
15. What is the main role of the small intestine in digestion?
Answer: It completes much of chemical digestion and absorbs most nutrients.
16. A person becomes dehydrated after prolonged sweating. Which hormone helps
the kidneys conserve water by increasing water reabsorption in the collecting ducts?
A. Insulin
B. Antidiuretic hormone (ADH)
C. Calcitonin
D. Glucagon
Answer: B. Antidiuretic hormone (ADH).
Explanation: ADH increases the water permeability of parts of the kidney's collecting ducts,
helping reduce water loss in urine.
, 17. Which cells are primarily responsible for producing antibodies?
A. Activated B cells differentiated into plasma cells
B. Red blood cells
C. Platelets
D. Osteoclasts
Answer: A. Activated B cells differentiated into plasma cells.
18. Match each anatomical term to its correct meaning.
1. Superior
2. Distal
3. Medial
4. Posterior
A. Toward the back
B. Farther from the point of attachment
C. Toward the midline
D. Above or toward the head
Answer: 1–D, 2–B, 3–C, 4–A.
19. Which part of a neuron typically receives incoming signals from other neurons?
A. Dendrites
B. Myelin sheath
C. Axon terminals only
D. Node of Ranvier
Answer: A. Dendrites.
20. True or false: The left ventricle pumps blood into the pulmonary artery.
Answer: False.
Explanation: The left ventricle pumps oxygenated blood into the aorta for systemic
circulation. The right ventricle pumps blood into the pulmonary trunk.
21. What is the main function of osteoclasts in bone tissue?
A. Produce antibodies
B. Break down and resorb bone matrix
C. Form the myelin sheath
D. Store oxygen for muscles
Answer: B. Break down and resorb bone matrix.
22. Which sequence correctly traces the movement of air from the trachea to the site
of gas exchange?
