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Assertion: Human heart is myogenic. Re...

Assertion: Human heart is myogenic.
Reason: Normal activities of the heart are regulated intrinsically, il.e., auto regulated by specialised muscles (nodal tissur).

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Normal activities of the heart are regulated by.......

P.Normal activities of the heart are regulated extrinsically i. e auto regulated by specialized muscles. Q. A special neural center in the medulla oblongata can moderate the cardiac function through the autonomic nervous function ( ANS) . R. Parasympathetic mental signals decrease the rate of heartbeat. S. Adrenal medullary hormones increase cardiac output. How many of the given statements are incorrect about the regulation of cardiac activities ?

P.Normal activities of the heart are regulated extrinsically i. e auto regulated by specialized muscles. Q. A special neural center in the medulla oblongata can moderate the cardiac function through the autonomic nervous function ( ANS) . R. Parasympathetic mental signals decrease the rate of heartbeat. S. Adrenal medullary hormones increase cardiac output. How many of the given statements are incorrect about the regulation of cardiac activities ?

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Assertion : human heart shows double circulation . Reason : In double circulation the oxygenated and deoxygenated , blood are mixed and pass through the heart only once .

Name the nodal tissues regulating the heart beat.

Read the assertion and reason carefully to mark the correct option out of the options given below: (a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion (c) If the assertion is true but the reason is false (d) If both the assertion and reason are false (e) If the assertion is false but reason is true Assertion : Heart valves resemble swing doors in action Reason : Valves are present in the heart chamber, at the opening of the heart into large arteries and veins.