BIOLOGY 2404 – Which of the following is an important

10 Jun BIOLOGY 2404 – Which of the following is an important

Question
1. Which of the following is an important characteristic of capillaries?

a. Blood flows through them quickly and exchange occurs slowly.

b. Blood flows through them slowly and exchange occurs quickly.

c. They expand and recoil with elastic rebound.

d. None of the above is correct.

2. Why does blood pressure increase during exercise?

a. because heart rate increases

b. because of decreased sympathetic tone

c. because stroke volume increases

d. both A and C

3. Why is blood pressure higher in the aorta than in the inferior vena cava?

a. The diameter of the aorta is smaller and

velocity of blood flow is also greater.

b. The cross-sectional area of both is the same,

but velocity is higher in the inferior vena cava.

c. Arterial branching is less than that of arteries.

d. The aorta is shorter than the inferior vena cava.

4. Although it is true that arteries carry ___, it is NOT always true that they carry _____ blood.

a. blood away from the heart; O2 rich

b. blood away from the heart; O2 poor

c. blood to the heart; O2 poor

d. blood to the heart; O2 rich

5. Mr. Petit has been prescribed an ACE inhibitor. What effect will this have on his body?

a. It will inhibit the conversion of angiotensinogen to angiotensin 1.

b. It will stimulate an increase of cardiac output and vasoconstriction.

c. It will stimulate the cascade of events following release of EPO.

d. It will inhibit the conversion of angiotensin 1 to angiotensin 2.

6. Lymphocytes provide an adaptive or specific defense known as the

a. phagocytic response.

b. adaptive defense.

c. immune response.

d. lymphocytic response.

e. inflammation of tissues.

7. The cells responsible for humoral immunity are the ________ cells.

a. NK

b. B

c. helper T

d. cytotoxic T

e. suppressor T

8. The medullary cords of a lymph node contain ________ lymphocytes and plasma cells.

a. cytotoxic T

b. medullary

c. NK

d. B

e. cordal

9. Lymphocytes

a. are actively phagocytic.

b. destroy red blood cells.

c. respond to antigens.

d. are primarily found in red bone marrow.

e. decrease in number during infection.

10. The ________ is shared by the respiratory and digestive systems.

A) pharynx

B) esophagus

C) trachea

D) windpipe

E) right mainstem bronchus

11. The partial pressure of oxygen in arterial blood is approximately

A) 40 mm Hg.

B) 45 mm Hg.

C) 50 mm Hg.

D) 70 mm Hg.

E) 100 mm Hg.

12. The vocal folds are located within the

A) nasopharynx.

B) oropharynx.

C) larynx.

D) trachea.

E) bronchi.