ANATOMY
CHEST AND CARDIOVASCULAR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following is CORRECT concerning a single cardiac cycle?
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lasts 8 seconds
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forces blood from areas of low to high pressure
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includes only functions of the ventricles
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includes all events associated with 1 heart beat
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Explanation:
Detailed explanation-1: -The sequence of events in one heartbeat is called the cardiac cycle. The cardiac cycle refers to the repeating series of contraction and relaxation that moves blood through the heart. It is divided into two phases known as the contraction and relaxation phases.
Detailed explanation-2: -contraction of atria, contraction of ventricles, rest is correct.
Detailed explanation-3: -The cardiac cycle describes all the activities of the heart through one complete heartbeat-that is, through one contraction and relaxation of both the atria and ventricles. A contraction event (of either the atria or ventricles) is referred to as systole, and a relaxation event is referred to as diastole.
There is 1 question to complete.