Circulatory system - simple quiz PDF

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1. The heart contracts twice for every heartbeat. One contraction is the atrial contraction while the other is the ventricular contraction. During ventricular contraction, which two valves of the heart open? Choose 1 answer: ( Ch oice A)

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A Aortic and tricuspid valves ( Ch oice B)

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B Pulmonary and aortic valves ( Ch oice C)

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C Pulmonary and tricuspid valves ( Ch oice D)

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D Aortic and mitral valves

2. Al t hought heski erhasaj acketon,shei sst i l l col d.Howcanherci r cul at or ysys t em hel pk eep herwar m? A. The arterioles at the surface of her skin can vasoconstrict so more heat leaves her body. The arterioles at the surface of her skin can vasoconstrict so less heat leaves her B. body. C The arterioles at the surface of her skin can vasodilate so less heat leaves her body. D The arterioles at the surface of her skin can vasodilate so more heat leaves her body. B.

( Ch oice B)

C.

( Ch oice C)

D.

( Ch oice D)

3. What divides the left side of the heart from the right side? a. Septum b. Atrium c. Ventricles d. Wall 4. What happens when blood pools in the veins? a. You fall over b. You become paralyzed c. You get varicose veins 5. a. b. c. d.

What is your strongest muscle? Your lungs Your legs Your arms Your heart...