ANATOMY
CHEST AND CARDIOVASCULAR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The human heart is referred to as myogenic because
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nerve impulses stimulate the heart muscle tissue to contract
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an individual has an SA node that is not functioning
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a signal originates within the heart muscle tissue to contract
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the size of the heart is genetically determined based on the myocyte gene
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Explanation:
Detailed explanation-1: -The SA node has the inherent power of generating a wave of contraction and controlling the heartbeat. Hence, it is known as the pacemaker. Since the heartbeat is initiated by the SA node and the impulse of contraction originates in the heart itself, the human heart is termed myogenic.
Detailed explanation-2: -In mammalian heart the heartbeat originates from Sinoatrial node.
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