Question

saadia mohamed
emery adult learning centre
test circulatory system sbi3u1
ku / 10 app / 15 thinking /10 comm- /15

1. a. 1. systole means

a) expansion of heart
b) contraction of heart
c) contraction of superior vena cava
d) contraction of inferior vena cava

1. the site of exchange of materials between the circulatory system and the body cells is

the:
a) arteriole
b) capillary
c) venule
d) vena cava

1. human beings have a double circulatory system that includes pulmonary circulation and

systemic circulation. complete the following statement by choosing the correct pair of terms
below. during systemic circulation, ______________ blood is carried away from the
heart. during pulmonary circulation, ________________ blood is carried away from the
heart.
a. oxygenated; deoxygenated
b. deoxygenated; deoxygenated
c. oxygenated; oxygenated
d. deoxygenated; oxygenated

1. valve which is present between right atrium and ventricle is:

a) bicuspid valve
b) tricuspid valve
c) semilunar valve
d) none of the above

1. which condition would a stent be most likely used to treat?

a) arteriosclerosis
b) mitral valve prolepse
c) hypertension
d) arrhythmia

Explanation:

1. Systole is the contraction phase of the cardiac cycle. The heart contracts to pump blood out.
2. Capillaries have thin walls, allowing for easy exchange of materials (e.g., oxygen, nutrients, carbon dioxide) between the blood and body cells.
3. In systemic circulation, oxygenated blood (from the lungs) is pumped to the body. In pulmonary circulation, deoxygenated blood (from the body) is pumped to the lungs.
4. The tricuspid valve is between the right atrium and right ventricle. The bicuspid (mitral) valve is between the left atrium and left ventricle. Semilunar valves are at the exits of the ventricles (pulmonary and aortic).
5. A stent is a small tube placed in an artery to keep it open. Arteriosclerosis involves hardening/narrowing of arteries, which a stent can treat. Mitral valve prolapse (b) is a valve issue, hypertension (c) is high - blood pressure (treated with meds, lifestyle), arrhythmia (d) is irregular heart rhythm (treated with meds, devices like pacemakers).

Answer:

1. b) Contraction of heart
2. b) capillary
3. a. oxygenated; deoxygenated
4. b) tricuspid valve
5. a) arteriosclerosis