MEDICAL
HEART AND PERICARDIUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The plateau
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Repolarization
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Tetanus
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Refractory period
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Detailed explanation-1: -Cardiac muscle cell contractions last roughly 10 times longer than those of skeletal muscle fibres. The properties of cardiac muscle cell membranes differ from those of skeletal muscle fibres. As a result, cardiac muscle tissue cannot undergo tetanus (sustained contraction).
Detailed explanation-2: -Standard texts of human physiology define and describe summation and tetanus in skeletal muscle. The same sources establish that these phenomena are thought not to occur, under ordinary circumstances, in heart muscle.
Detailed explanation-3: -Which of the following is NOT characteristic of cardiac muscle? Explanation: Skeletal muscle is the only muscle type that is multinucleated. Both cardiac and smooth muscle cells have only one nucleus.