BIOS 256 Week 6 Quiz Exam 4 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A –
Chamberlain
1. What is the primary function of the circulatory system?
A. Gas exchange
B. Transport of nutrients, gases, and wastes
C. Hormone production
D. Immune defense
Correct Answer: B
Rationale: The circulatory system moves oxygen, nutrients, and
wastes to and from body tissues.
2. Which chamber of the heart receives oxygenated blood from
the lungs?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Correct Answer: C
,Rationale: The left atrium receives oxygen-rich blood from the
pulmonary veins.
3. Which blood vessels carry blood away from the heart?
A. Veins
B. Arteries
C. Capillaries
D. Venules
Correct Answer: B
Rationale: Arteries carry blood away from the heart under high
pressure.
4. Which blood vessels are the site of nutrient and gas exchange?
A. Arteries
B. Veins
C. Capillaries
D. Arterioles
Correct Answer: C
Rationale: Capillaries have thin walls allowing exchange of gases,
nutrients, and wastes.
5. Which chamber pumps blood to the lungs?
A. Right atrium
B. Right ventricle
C. Left atrium
,D. Left ventricle
Correct Answer: B
Rationale: The right ventricle pumps deoxygenated blood into the
pulmonary artery.
6. Which valve prevents backflow from the left ventricle to the
left atrium?
A. Tricuspid valve
B. Bicuspid (mitral) valve
C. Pulmonary valve
D. Aortic valve
Correct Answer: B
Rationale: The mitral valve prevents blood from flowing back into
the left atrium.
7. Which valve prevents backflow from the right ventricle to the
right atrium?
A. Tricuspid valve
B. Bicuspid valve
C. Pulmonary valve
D. Aortic valve
Correct Answer: A
Rationale: The tricuspid valve ensures one-way flow from right
atrium to right ventricle.
8. What is the function of the SA node?
, A. Pump blood
B. Initiate heartbeat
C. Exchange gases
D. Control blood pressure
Correct Answer: B
Rationale: The sinoatrial node generates electrical impulses
initiating each heartbeat.
9. Which blood vessels have valves to prevent backflow?
A. Arteries
B. Veins
C. Capillaries
D. Arterioles
Correct Answer: B
Rationale: Veins contain valves to prevent backward blood flow due
to low pressure.
10. What is the largest artery in the body?
A. Pulmonary artery
B. Aorta
C. Coronary artery
D. Carotid artery
Correct Answer: B
Rationale: The aorta is the main artery carrying oxygenated blood
from the heart.
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A –
Chamberlain
1. What is the primary function of the circulatory system?
A. Gas exchange
B. Transport of nutrients, gases, and wastes
C. Hormone production
D. Immune defense
Correct Answer: B
Rationale: The circulatory system moves oxygen, nutrients, and
wastes to and from body tissues.
2. Which chamber of the heart receives oxygenated blood from
the lungs?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Correct Answer: C
,Rationale: The left atrium receives oxygen-rich blood from the
pulmonary veins.
3. Which blood vessels carry blood away from the heart?
A. Veins
B. Arteries
C. Capillaries
D. Venules
Correct Answer: B
Rationale: Arteries carry blood away from the heart under high
pressure.
4. Which blood vessels are the site of nutrient and gas exchange?
A. Arteries
B. Veins
C. Capillaries
D. Arterioles
Correct Answer: C
Rationale: Capillaries have thin walls allowing exchange of gases,
nutrients, and wastes.
5. Which chamber pumps blood to the lungs?
A. Right atrium
B. Right ventricle
C. Left atrium
,D. Left ventricle
Correct Answer: B
Rationale: The right ventricle pumps deoxygenated blood into the
pulmonary artery.
6. Which valve prevents backflow from the left ventricle to the
left atrium?
A. Tricuspid valve
B. Bicuspid (mitral) valve
C. Pulmonary valve
D. Aortic valve
Correct Answer: B
Rationale: The mitral valve prevents blood from flowing back into
the left atrium.
7. Which valve prevents backflow from the right ventricle to the
right atrium?
A. Tricuspid valve
B. Bicuspid valve
C. Pulmonary valve
D. Aortic valve
Correct Answer: A
Rationale: The tricuspid valve ensures one-way flow from right
atrium to right ventricle.
8. What is the function of the SA node?
, A. Pump blood
B. Initiate heartbeat
C. Exchange gases
D. Control blood pressure
Correct Answer: B
Rationale: The sinoatrial node generates electrical impulses
initiating each heartbeat.
9. Which blood vessels have valves to prevent backflow?
A. Arteries
B. Veins
C. Capillaries
D. Arterioles
Correct Answer: B
Rationale: Veins contain valves to prevent backward blood flow due
to low pressure.
10. What is the largest artery in the body?
A. Pulmonary artery
B. Aorta
C. Coronary artery
D. Carotid artery
Correct Answer: B
Rationale: The aorta is the main artery carrying oxygenated blood
from the heart.
