The mammalian heart is myogenic and it is regulated by nerves. The heartbeat originates from
[amp_mcq option1=”sinoatrial node” option2=”QRS wave” option3=”T wave” option4=”hepatic portal system” correct=”option1″]
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UPSC CDS-1 – 2017
The heartbeat originates from the sinoatrial node.
The sinoatrial (SA) node is a specialized group of cells located in the wall of the right atrium of the heart. It is the natural pacemaker of the heart, generating electrical impulses that initiate each heartbeat. The mammalian heart’s ability to generate its own impulse is referred to as its myogenic nature.