BIOS 252 Anatomy & Physiology II Exam
1 (Latest Update ) Anatomy
and Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which type of blood vessel carries blood away from the heart?
A. Veins
B. Arteries
C. Capillaries
D. Venules
Correct Answer: B. Arteries
Rationale: Arteries transport oxygenated blood (except pulmonary
artery) from the heart to tissues.
2. Which blood vessel carries blood toward the heart?
A. Veins
B. Arteries
C. Arterioles
D. Capillaries
Correct Answer: A. Veins
,Rationale: Veins return deoxygenated blood (except pulmonary
veins) to the heart.
3. Which blood vessel allows exchange of gases and nutrients?
A. Capillaries
B. Arteries
C. Veins
D. Venules
Correct Answer: A. Capillaries
Rationale: Thin walls facilitate diffusion between blood and tissues.
4. Which layer of the heart wall contains cardiac muscle?
A. Myocardium
B. Epicardium
C. Endocardium
D. Pericardium
Correct Answer: A. Myocardium
Rationale: Myocardium is composed of contractile cardiac muscle
cells.
5. Which heart valve prevents backflow into the right atrium?
A. Tricuspid valve
B. Mitral valve
C. Pulmonary valve
D. Aortic valve
,Correct Answer: A. Tricuspid valve
Rationale: Right AV valve prevents backflow from ventricle to
atrium.
6. Which heart valve prevents backflow into the left atrium?
A. Mitral valve
B. Tricuspid valve
C. Pulmonary valve
D. Aortic valve
Correct Answer: A. Mitral valve
Rationale: Left AV valve ensures one-way flow from atrium to
ventricle.
7. Which valves prevent backflow into the ventricles?
A. Semilunar valves
B. AV valves
C. Mitral valve only
D. Tricuspid valve only
Correct Answer: A. Semilunar valves
Rationale: Pulmonary and aortic valves prevent blood return to
ventricles.
8. Which node initiates the heartbeat?
A. SA node
B. AV node
, C. Purkinje fibers
D. Bundle of His
Correct Answer: A. SA node
Rationale: Sinoatrial node is the pacemaker of the heart.
9. Which node delays the action potential to allow atrial
contraction?
A. AV node
B. SA node
C. Purkinje fibers
D. Bundle of His
Correct Answer: A. AV node
Rationale: Ensures ventricles fill with blood before contraction.
10. Which fibers distribute the action potential through the
ventricles?
A. Purkinje fibers
B. SA node
C. AV node
D. Bundle of His
Correct Answer: A. Purkinje fibers
Rationale: Rapid conduction triggers synchronized ventricular
contraction.
11. What is the normal sequence of blood flow through the heart?
1 (Latest Update ) Anatomy
and Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which type of blood vessel carries blood away from the heart?
A. Veins
B. Arteries
C. Capillaries
D. Venules
Correct Answer: B. Arteries
Rationale: Arteries transport oxygenated blood (except pulmonary
artery) from the heart to tissues.
2. Which blood vessel carries blood toward the heart?
A. Veins
B. Arteries
C. Arterioles
D. Capillaries
Correct Answer: A. Veins
,Rationale: Veins return deoxygenated blood (except pulmonary
veins) to the heart.
3. Which blood vessel allows exchange of gases and nutrients?
A. Capillaries
B. Arteries
C. Veins
D. Venules
Correct Answer: A. Capillaries
Rationale: Thin walls facilitate diffusion between blood and tissues.
4. Which layer of the heart wall contains cardiac muscle?
A. Myocardium
B. Epicardium
C. Endocardium
D. Pericardium
Correct Answer: A. Myocardium
Rationale: Myocardium is composed of contractile cardiac muscle
cells.
5. Which heart valve prevents backflow into the right atrium?
A. Tricuspid valve
B. Mitral valve
C. Pulmonary valve
D. Aortic valve
,Correct Answer: A. Tricuspid valve
Rationale: Right AV valve prevents backflow from ventricle to
atrium.
6. Which heart valve prevents backflow into the left atrium?
A. Mitral valve
B. Tricuspid valve
C. Pulmonary valve
D. Aortic valve
Correct Answer: A. Mitral valve
Rationale: Left AV valve ensures one-way flow from atrium to
ventricle.
7. Which valves prevent backflow into the ventricles?
A. Semilunar valves
B. AV valves
C. Mitral valve only
D. Tricuspid valve only
Correct Answer: A. Semilunar valves
Rationale: Pulmonary and aortic valves prevent blood return to
ventricles.
8. Which node initiates the heartbeat?
A. SA node
B. AV node
, C. Purkinje fibers
D. Bundle of His
Correct Answer: A. SA node
Rationale: Sinoatrial node is the pacemaker of the heart.
9. Which node delays the action potential to allow atrial
contraction?
A. AV node
B. SA node
C. Purkinje fibers
D. Bundle of His
Correct Answer: A. AV node
Rationale: Ensures ventricles fill with blood before contraction.
10. Which fibers distribute the action potential through the
ventricles?
A. Purkinje fibers
B. SA node
C. AV node
D. Bundle of His
Correct Answer: A. Purkinje fibers
Rationale: Rapid conduction triggers synchronized ventricular
contraction.
11. What is the normal sequence of blood flow through the heart?
