Week 8

Question 1

1. The atrioventricular valves
   a) have chordae tendineae attached to the inner walls of the atria
   b) are also called the aortic & mitral valves
   c) prevent backflow of blood into the atria
   d) are located at the base of the aorta and pulmonary trunk

Answer 1

c) prevent backflow of blood into the atria

Question 2

2. Which of the following statements relating to the right ventricle chamber is TRUE?
   a) pumps blood directly into the systemic circulation
   b) inner surface provides points of attachment for the
   chordae tendinae of the tricuspid
   c) outer surface of the chamber wall is lined by a
   membrane called the peritoneum
   d) blood exiting this chamber passes through the
   aortic semilunar valve

Answer 2

b) inner surface provides points of attachment for the

chordae tendinae of the tricuspid

Question 3

3. Which of the following statements relating to the heart is correct?
   a) the atrioventicular valve on the left side of the heart has 2 cusps
   b) the myocardium is composed primarily of dense regular connective tissue
   c) the apex of the heart is normally adjacent to the inferior aspect of the right lung
   d) the pulmonary veins empty blood into the right atrium

Answer 3

a) the atrioventicular valve on the left side of the heart has 2 cusps

Question 4

4. Blood is pumped from the heart to the lungs
   a) through a semilunar valve
   b) and returned to the right atrium via the pulmonary trunk
   c) through the mitral valve
   d) as a direct result of pressure generated by contraction of the left ventricle

Answer 4

a) through a semilunar valve

Question 5

5. The innermost tissue layer found in an artery or vein is referred to as the
   a) tunica externa
   b) tunica adventitia
   c) tunica media
   d) tunica intima

Answer 5

d) tunica intima

Question 6

7. If the connections between the VAGUS nerves and the heart are severed the heart will
   a) beat more slowly
   b) beat more quickly
   c) fail to register a P wave on an ECG
   d) lose all sympathetic input

Answer 6

b) beat more quickly

Question 7

8. The first ascending bump in an ECG is which of the following?
   a) ventricular repolarisation
   b) atrial depolarisation
   c) atrial repolarisation
   d) ventricular depolarisation

Answer 7

b) atrial depolarisation

Question 8

9. A man visits his doctor to check his blood pressure and obtains a reading of 120/80. The
   lower of these two values is obtained when the
   a) ventricles contract.
   b) blood is ejected into the aorta and pulmonary trunk.
   d) semilunar valves are closed.
   e) AV valves are closed.

Answer 8

d) semilunar valves are closed.

Question 9

10. Which of the following vessels contain deoxygenated blood?
11. Inferior vena cava.
12. Pulmonary veins.
13. Pulmonary arteries.
14. Left common iliac artery.
15. Coeliac trunk.

Answer 9

a) inferior vena cava - 1 and pulmonary arteries - 3