Exam 3:
BIOS252 Anatomy &
Physiology II with Lab
Q1. Which layer of the heart wall is responsible for the pumping action?
A. Epicardium
B. Endocardium
C. Myocardium
D. Pericardium
Answer: C. Myocardium
Q2. Which heart valve prevents backflow of blood from the left ventricle into the left
atrium?
A. Pulmonary semilunar valve
B. Tricuspid valve
C. Bicuspid (mitral) valve
,D. Aortic semilunar valve
Answer: C. Bicuspid (mitral) valve
Q3. The pacemaker of the heart is the:
A. AV node
B. Purkinje fibers
C. SA node
D. Bundle of His
Answer: C. SA node
Blood Vessels & Circulation
Q4. Which type of blood vessel has the greatest ability to regulate blood pressure
and flow?
A. Arteries
B. Arterioles
C. Capillaries
D. Veins
Answer: B. Arterioles
Q5. Which blood vessels serve as the major site for exchange of nutrients and gases?
,A. Arteries
B. Arterioles
C. Capillaries
D. Venules
Answer: C. Capillaries
Lymphatic & Immune System
Q6. The primary lymphoid organs are:
A. Lymph nodes and tonsils
B. Spleen and lymph nodes
C. Thymus and red bone marrow
D. Peyer’s patches and appendix
Answer: C. Thymus and red bone marrow
Q7. Which type of immunity is gained after vaccination?
A. Natural active
B. Artificial active
C. Natural passive
, D. Artificial passive
Answer: B. Artificial active
Q8. Cytotoxic T cells destroy infected cells by releasing:
A. Histamine
B. Interleukins
C. Perforin and granzymes
D. Antibodies
Answer: C. Perforin and granzymes
Respiratory System
Q9. Which law states that the pressure of a gas is inversely proportional to its
volume?
A. Boyle’s law
B. Charles’s law
C. Dalton’s law
D. Henry’s law
Answer: A. Boyle’s law
BIOS252 Anatomy &
Physiology II with Lab
Q1. Which layer of the heart wall is responsible for the pumping action?
A. Epicardium
B. Endocardium
C. Myocardium
D. Pericardium
Answer: C. Myocardium
Q2. Which heart valve prevents backflow of blood from the left ventricle into the left
atrium?
A. Pulmonary semilunar valve
B. Tricuspid valve
C. Bicuspid (mitral) valve
,D. Aortic semilunar valve
Answer: C. Bicuspid (mitral) valve
Q3. The pacemaker of the heart is the:
A. AV node
B. Purkinje fibers
C. SA node
D. Bundle of His
Answer: C. SA node
Blood Vessels & Circulation
Q4. Which type of blood vessel has the greatest ability to regulate blood pressure
and flow?
A. Arteries
B. Arterioles
C. Capillaries
D. Veins
Answer: B. Arterioles
Q5. Which blood vessels serve as the major site for exchange of nutrients and gases?
,A. Arteries
B. Arterioles
C. Capillaries
D. Venules
Answer: C. Capillaries
Lymphatic & Immune System
Q6. The primary lymphoid organs are:
A. Lymph nodes and tonsils
B. Spleen and lymph nodes
C. Thymus and red bone marrow
D. Peyer’s patches and appendix
Answer: C. Thymus and red bone marrow
Q7. Which type of immunity is gained after vaccination?
A. Natural active
B. Artificial active
C. Natural passive
, D. Artificial passive
Answer: B. Artificial active
Q8. Cytotoxic T cells destroy infected cells by releasing:
A. Histamine
B. Interleukins
C. Perforin and granzymes
D. Antibodies
Answer: C. Perforin and granzymes
Respiratory System
Q9. Which law states that the pressure of a gas is inversely proportional to its
volume?
A. Boyle’s law
B. Charles’s law
C. Dalton’s law
D. Henry’s law
Answer: A. Boyle’s law
