Cardiac activities of the heart are regulated | vedclass

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(A) The cardiac activities of the heart are regulated by both intrinsic and extrinsic mechanisms:$1$. Intrinsic regulation: The heart is myogenic,mean

Vedclass · Accepted Answer

$A, B$ and $C$ Only

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(A) The cardiac activities of the heart are regulated by both intrinsic and extrinsic mechanisms:$1$. Intrinsic regulation: The heart is myogenic,meaning its rhythmic contraction is initiated by specialized nodal tissues ($SA$ node and $AV$ node).$2$. Neural regulation: $A$ special neural center in the medulla oblongata can moderate cardiac functions through the autonomic nervous system $(ANS)$.$3$. Hormonal regulation: Hormones secreted by the adrenal medulla,such as adrenaline and noradrenaline,significantly increase cardiac output during stress or exercise.$4$. Adrenal cortical hormones (like cortisol or aldosterone) are primarily involved in glucose metabolism and electrolyte balance,not in the direct regulation of cardiac activity.Therefore,$A, B,$ and $C$ are correct,while $D$ is incorrect.

Cardiac activities of the heart are regulated by:
$A.$ Nodal tissue
$B.$ $A$ special neural centre in the medulla oblongata
$C.$ Adrenal medullary hormones
$D.$ Adrenal cortical hormones
Choose the correct answer from the options given below:

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Cardiac activities of the heart are regulated by:$A.$ Nodal tissue$B.$ $A$ special neural centre in the medulla oblongata$C.$ Adrenal medullary hormones$D.$ Adrenal cortical hormonesChoose the correct answer from the options given below: