{"id":84646,"date":"2025-06-01T02:43:11","date_gmt":"2025-06-01T02:43:11","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=84646"},"modified":"2025-06-01T02:43:11","modified_gmt":"2025-06-01T02:43:11","slug":"the-mammalian-heart-is-myogenic-and-it-is-regulated-by-nerves-the-hea","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-mammalian-heart-is-myogenic-and-it-is-regulated-by-nerves-the-hea\/","title":{"rendered":"The mammalian heart is myogenic and it is regulated by nerves. The hea"},"content":{"rendered":"

The mammalian heart is myogenic and it is regulated by nerves. The heartbeat originates from<\/p>\n

[amp_mcq option1=”sinoatrial node” option2=”QRS wave” option3=”T wave” option4=”hepatic portal system” correct=”option1″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC CDS-1 – 2017<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
The heartbeat originates from the sinoatrial node.<\/section>\n
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.<\/section>\n
The SA node impulse spreads through the atria, causing them to contract, and then reaches the atrioventricular (AV) node, which conducts the impulse to the ventricles. The QRS wave and T wave are graphical representations of electrical activity in the ventricles during an electrocardiogram (ECG). The hepatic portal system is part of the circulatory system involved in blood transport from the digestive organs to the liver.<\/section>\n","protected":false},"excerpt":{"rendered":"

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″] This question was previously asked in UPSC CDS-1 – 2017 Download PDFAttempt Online The heartbeat originates from the sinoatrial node. The sinoatrial (SA) node is a specialized group of … <\/p>\n

Detailed SolutionThe mammalian heart is myogenic and it is regulated by nerves. The hea<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1087],"tags":[1101,1117,1126],"class_list":["post-84646","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-1","tag-1101","tag-biology","tag-circulatory-system","no-featured-image-padding"],"yoast_head":"\nThe mammalian heart is myogenic and it is regulated by nerves. The hea<\/title>\n<meta name=\"description\" content=\"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. 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