Biology 1220 .com



Biology 1220

Quiz #7

Name:________________________________________________________

Total Marks: 31 Total Pages: 3

(1) 1. Through how many capillary beds must a human red blood cell travel if it takes the shortest possible route from the right ventricle to the right atrium?

A) one

B) two

C) three

D) four

E) five

(1) 2. What is the name of the mass of tissue located between the lungs, which is the location of the heart?

____________________________________________________________

(2) 3. Which chambers of the heart carry oxygenated blood (after birth)?

(2) 4. There are several major vessels which are directly associated with the heart: the superior vena cava, the inferior vena cava, the coronary sinus, the pulmonary trunk, and the aorta. Which of these vessels carries oxygenated blood?

(3) 5. The ___________empties into the right atrium.

1.__________________________________________________________

2.__________________________________________________________

3.__________________________________________________________

(1) 6. Blood normally leaves the right ventricle through:

A. the pulmonary semilunar valve

B. the right atrioventricular valve

C. the left atrioventricular valve

D. the aortic semilunar valve

E. it doesn’t pass through a valve

(1) 7. How many pulmonary arteries empty into the left atrium of the heart?

A. none

B. one

C. two

D. four

E. six

(3) 8. Describe the basic structure and function of the pericardium.

(3) 9. Name the three layers of the heart wall, superficial to deep.

1._________________________________________________________

2.__________________________________________________________

3.__________________________________________________________

(1) 10. The individual chambers of the heart are easily identified by dissecting the heart to reveal the interior. However, there are external landmarks that distinguish the chambers. What is the name of the grooves on the external surface of the heart that locate the divisions between the heart chambers?

____________________________________________________________

(1) 11. What is the general term used to describe the tissue divisions between the heart chambers.

____________________________________________________________

(2) 12. In very basic terms, describe how the heart can establish its own pace of contraction.

(5) 13. Compare the structure and function of cardiac myocytes with skeletal muscle fibers.

(5) 14. Draw a labeled diagram of the heart describing the structures associated with the conduction system of the heart. Add a written description of the basic timing of the events associated with the conduction system: where does the signal originate, where does it go, what does it do?

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