BIOS 252 Week 5 Quiz Exam final (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What is the primary function of red blood cells?
A. Fight infection
B. Transport oxygen
C. Clot blood
D. Regulate pH
Correct Answer: B
Rationale: Red blood cells contain hemoglobin which binds and
carries oxygen.
2. Which white blood cell is responsible for antibody production?
A. Neutrophils
B. Basophils
C. Lymphocytes
D. Monocytes
Correct Answer: C
Rationale: B-lymphocytes produce antibodies targeting specific
antigens.
,3. Platelets are primarily responsible for:
A. Transporting oxygen
B. Fighting infection
C. Blood clotting
D. Carrying nutrients
Correct Answer: C
Rationale: Platelets aggregate at injury sites and initiate clot
formation.
4. Plasma is composed mainly of:
A. Red blood cells
B. Water
C. Platelets
D. White blood cells
Correct Answer: B
Rationale: Plasma is ~90% water and transports nutrients,
hormones, and waste.
5. Hemoglobin binds to:
A. Oxygen only
B. Carbon dioxide only
C. Oxygen and carbon dioxide
D. Platelets
Correct Answer: C
,Rationale: Hemoglobin carries oxygen from lungs to tissues and
CO₂ back to lungs.
6. The natural pacemaker of the heart is:
A. AV node
B. SA node
C. Purkinje fibers
D. Bundle of His
Correct Answer: B
Rationale: The SA node initiates the heartbeat and sets heart rate.
7. Blood leaves the heart through:
A. Veins
B. Arteries
C. Capillaries
D. Lymph vessels
Correct Answer: B
Rationale: Arteries carry oxygenated blood from the heart to the
body.
8. Blood returns to the heart via:
A. Arteries
B. Veins
C. Capillaries
D. Lymph vessels
, Correct Answer: B
Rationale: Veins carry deoxygenated blood back to the right atrium.
9. The smallest blood vessels are:
A. Arteries
B. Veins
C. Capillaries
D. Venules
Correct Answer: C
Rationale: Capillaries allow exchange of oxygen, carbon dioxide,
and nutrients.
10. Which heart chamber pumps blood to the lungs?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Correct Answer: B
Rationale: Right ventricle pumps deoxygenated blood to the lungs
via the pulmonary artery.
11. Which heart chamber pumps blood to the body?
A. Right ventricle
B. Right atrium
C. Left ventricle
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What is the primary function of red blood cells?
A. Fight infection
B. Transport oxygen
C. Clot blood
D. Regulate pH
Correct Answer: B
Rationale: Red blood cells contain hemoglobin which binds and
carries oxygen.
2. Which white blood cell is responsible for antibody production?
A. Neutrophils
B. Basophils
C. Lymphocytes
D. Monocytes
Correct Answer: C
Rationale: B-lymphocytes produce antibodies targeting specific
antigens.
,3. Platelets are primarily responsible for:
A. Transporting oxygen
B. Fighting infection
C. Blood clotting
D. Carrying nutrients
Correct Answer: C
Rationale: Platelets aggregate at injury sites and initiate clot
formation.
4. Plasma is composed mainly of:
A. Red blood cells
B. Water
C. Platelets
D. White blood cells
Correct Answer: B
Rationale: Plasma is ~90% water and transports nutrients,
hormones, and waste.
5. Hemoglobin binds to:
A. Oxygen only
B. Carbon dioxide only
C. Oxygen and carbon dioxide
D. Platelets
Correct Answer: C
,Rationale: Hemoglobin carries oxygen from lungs to tissues and
CO₂ back to lungs.
6. The natural pacemaker of the heart is:
A. AV node
B. SA node
C. Purkinje fibers
D. Bundle of His
Correct Answer: B
Rationale: The SA node initiates the heartbeat and sets heart rate.
7. Blood leaves the heart through:
A. Veins
B. Arteries
C. Capillaries
D. Lymph vessels
Correct Answer: B
Rationale: Arteries carry oxygenated blood from the heart to the
body.
8. Blood returns to the heart via:
A. Arteries
B. Veins
C. Capillaries
D. Lymph vessels
, Correct Answer: B
Rationale: Veins carry deoxygenated blood back to the right atrium.
9. The smallest blood vessels are:
A. Arteries
B. Veins
C. Capillaries
D. Venules
Correct Answer: C
Rationale: Capillaries allow exchange of oxygen, carbon dioxide,
and nutrients.
10. Which heart chamber pumps blood to the lungs?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Correct Answer: B
Rationale: Right ventricle pumps deoxygenated blood to the lungs
via the pulmonary artery.
11. Which heart chamber pumps blood to the body?
A. Right ventricle
B. Right atrium
C. Left ventricle
