PHYSIOLOGY
CARDIOVASCULAR PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What does a normal cardiac cycle consist of?
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2 atria contracting while 2 ventricles relax, then vice versa.
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1 atria contract while the other relaxes
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2 ventricle and 1 atria contract, while the other atria relaxes
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None of the above
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Explanation:
Detailed explanation-1: -Both the atria and the ventricles undergo alternating states of systole and diastole. In other words, when the atria are in diastole, the ventricles are in systole and vice versa.
Detailed explanation-2: -Atrial systole: lasts about 0.1 seconds-both atria contract and force the blood from the atria into the ventricles. Ventricular systole: lasts about 0.3 seconds-both ventricles contract, blood is forced to the lungs via the pulmonary trunk, and the rest of the body via the aorta.
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