BIOS 252 Week 5 Quiz Exam 4 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which blood component carries oxygen?
A. Plasma
B. Platelets
C. Red blood cells
D. White blood cells
Correct Answer: C
Rationale: Red blood cells contain hemoglobin which binds oxygen.
2. Which blood cells fight infection?
A. Red blood cells
B. White blood cells
C. Platelets
D. Plasma
Correct Answer: B
Rationale: White blood cells are part of the immune system.
,3. Which blood component helps clotting?
A. Red blood cells
B. Platelets
C. Plasma
D. White blood cells
Correct Answer: B
Rationale: Platelets aggregate at injury sites to form clots.
4. Plasma is mainly composed of:
A. Water
B. Platelets
C. Red blood cells
D. White blood cells
Correct Answer: A
Rationale: Plasma is ~90% water and carries nutrients and
hormones.
5. Hemoglobin carries:
A. Carbon dioxide only
B. Oxygen only
C. Both oxygen and carbon dioxide
D. Plasma
Correct Answer: C
Rationale: Hemoglobin binds oxygen in lungs and carries CO₂ from
tissues.
,6. The heart’s pacemaker is:
A. AV node
B. SA node
C. Bundle of His
D. Purkinje fibers
Correct Answer: B
Rationale: SA node initiates heartbeat rhythm.
7. Blood leaves the heart through the:
A. Veins
B. Arteries
C. Capillaries
D. Lymph vessels
Correct Answer: B
Rationale: Arteries carry oxygenated blood from heart to body.
8. Blood returns to heart via:
A. Arteries
B. Veins
C. Capillaries
D. Lymph vessels
Correct Answer: B
Rationale: Veins carry deoxygenated blood back to the heart.
9. The smallest blood vessels are:
, A. Arteries
B. Veins
C. Capillaries
D. Venules
Correct Answer: C
Rationale: Capillaries allow exchange of gases and nutrients.
10. Which chamber pumps blood to lungs?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Correct Answer: B
Rationale: Right ventricle pumps deoxygenated blood to lungs.
11. Which chamber pumps blood to the body?
A. Right ventricle
B. Right atrium
C. Left ventricle
D. Left atrium
Correct Answer: C
Rationale: Left ventricle pumps oxygenated blood through the
aorta.
12. Which valves prevent backflow into atria?
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which blood component carries oxygen?
A. Plasma
B. Platelets
C. Red blood cells
D. White blood cells
Correct Answer: C
Rationale: Red blood cells contain hemoglobin which binds oxygen.
2. Which blood cells fight infection?
A. Red blood cells
B. White blood cells
C. Platelets
D. Plasma
Correct Answer: B
Rationale: White blood cells are part of the immune system.
,3. Which blood component helps clotting?
A. Red blood cells
B. Platelets
C. Plasma
D. White blood cells
Correct Answer: B
Rationale: Platelets aggregate at injury sites to form clots.
4. Plasma is mainly composed of:
A. Water
B. Platelets
C. Red blood cells
D. White blood cells
Correct Answer: A
Rationale: Plasma is ~90% water and carries nutrients and
hormones.
5. Hemoglobin carries:
A. Carbon dioxide only
B. Oxygen only
C. Both oxygen and carbon dioxide
D. Plasma
Correct Answer: C
Rationale: Hemoglobin binds oxygen in lungs and carries CO₂ from
tissues.
,6. The heart’s pacemaker is:
A. AV node
B. SA node
C. Bundle of His
D. Purkinje fibers
Correct Answer: B
Rationale: SA node initiates heartbeat rhythm.
7. Blood leaves the heart through the:
A. Veins
B. Arteries
C. Capillaries
D. Lymph vessels
Correct Answer: B
Rationale: Arteries carry oxygenated blood from heart to body.
8. Blood returns to heart via:
A. Arteries
B. Veins
C. Capillaries
D. Lymph vessels
Correct Answer: B
Rationale: Veins carry deoxygenated blood back to the heart.
9. The smallest blood vessels are:
, A. Arteries
B. Veins
C. Capillaries
D. Venules
Correct Answer: C
Rationale: Capillaries allow exchange of gases and nutrients.
10. Which chamber pumps blood to lungs?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Correct Answer: B
Rationale: Right ventricle pumps deoxygenated blood to lungs.
11. Which chamber pumps blood to the body?
A. Right ventricle
B. Right atrium
C. Left ventricle
D. Left atrium
Correct Answer: C
Rationale: Left ventricle pumps oxygenated blood through the
aorta.
12. Which valves prevent backflow into atria?
