BIOS 242 Week 1 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 the circulatory system?
A. Gas exchange
B. Transport nutrients and oxygen
C. Hormone production
D. Filtration of waste
Correct Answer: B
Rationale:The circulatory system delivers oxygen, nutrients, and
hormones to cells and removes waste products.
2. Which structure prevents backflow of blood from ventricles to
atria?
A. Semilunar valves
B. AV valves
C. Pulmonary veins
,D. Aorta
Correct Answer: B
Rationale:Atrioventricular valves (tricuspid and mitral) prevent
backflow during ventricular contraction.
3. Which chamber pumps blood to the lungs?
A. Left atrium
B. Left ventricle
C. Right atrium
D. Right ventricle
Correct Answer: D
Rationale:The right ventricle sends deoxygenated blood to the
pulmonary arteries for oxygenation.
4. Which vessel carries oxygenated blood to the body?
A. Pulmonary artery
B. Pulmonary vein
C. Aorta
D. Vena cava
Correct Answer: C
Rationale:The aorta distributes oxygen-rich blood from the left
ventricle to systemic circulation.
5. Which blood cells transport oxygen?
,A. White blood cells
B. Platelets
C. Red blood cells
D. Plasma cells
Correct Answer: C
Rationale:Hemoglobin in red blood cells binds and carries oxygen
to tissues.
6. Which type of circulation delivers blood to the lungs?
A. Systemic circulation
B. Pulmonary circulation
C. Coronary circulation
D. Portal circulation
Correct Answer: B
Rationale:Pulmonary circulation carries deoxygenated blood from
the heart to lungs and returns oxygenated blood.
7. Which layer of the heart wall contains cardiac muscle?
A. Endocardium
B. Myocardium
C. Epicardium
D. Pericardium
Correct Answer: B
Rationale:The myocardium is responsible for the contractile force
of the heart.
, 8. Which valves are located at the exit of ventricles?
A. AV valves
B. Semilunar valves
C. Mitral valve
D. Tricuspid valve
Correct Answer: B
Rationale:Semilunar valves (aortic and pulmonary) prevent
backflow during diastole.
9. What is the pacemaker of the heart?
A. AV node
B. SA node
C. Bundle of His
D. Purkinje fibers
Correct Answer: B
Rationale:The sinoatrial (SA) node initiates electrical impulses for
heartbeats.
10. Which blood type is universal donor?
A. A
B. B
C. AB
D. O
Correct Answer: D
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 nutrients and oxygen
C. Hormone production
D. Filtration of waste
Correct Answer: B
Rationale:The circulatory system delivers oxygen, nutrients, and
hormones to cells and removes waste products.
2. Which structure prevents backflow of blood from ventricles to
atria?
A. Semilunar valves
B. AV valves
C. Pulmonary veins
,D. Aorta
Correct Answer: B
Rationale:Atrioventricular valves (tricuspid and mitral) prevent
backflow during ventricular contraction.
3. Which chamber pumps blood to the lungs?
A. Left atrium
B. Left ventricle
C. Right atrium
D. Right ventricle
Correct Answer: D
Rationale:The right ventricle sends deoxygenated blood to the
pulmonary arteries for oxygenation.
4. Which vessel carries oxygenated blood to the body?
A. Pulmonary artery
B. Pulmonary vein
C. Aorta
D. Vena cava
Correct Answer: C
Rationale:The aorta distributes oxygen-rich blood from the left
ventricle to systemic circulation.
5. Which blood cells transport oxygen?
,A. White blood cells
B. Platelets
C. Red blood cells
D. Plasma cells
Correct Answer: C
Rationale:Hemoglobin in red blood cells binds and carries oxygen
to tissues.
6. Which type of circulation delivers blood to the lungs?
A. Systemic circulation
B. Pulmonary circulation
C. Coronary circulation
D. Portal circulation
Correct Answer: B
Rationale:Pulmonary circulation carries deoxygenated blood from
the heart to lungs and returns oxygenated blood.
7. Which layer of the heart wall contains cardiac muscle?
A. Endocardium
B. Myocardium
C. Epicardium
D. Pericardium
Correct Answer: B
Rationale:The myocardium is responsible for the contractile force
of the heart.
, 8. Which valves are located at the exit of ventricles?
A. AV valves
B. Semilunar valves
C. Mitral valve
D. Tricuspid valve
Correct Answer: B
Rationale:Semilunar valves (aortic and pulmonary) prevent
backflow during diastole.
9. What is the pacemaker of the heart?
A. AV node
B. SA node
C. Bundle of His
D. Purkinje fibers
Correct Answer: B
Rationale:The sinoatrial (SA) node initiates electrical impulses for
heartbeats.
10. Which blood type is universal donor?
A. A
B. B
C. AB
D. O
Correct Answer: D
