Cardiac activities of the heart are regulated | vedclass

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Question

(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

Vedclass · Answer

(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:

Similar Questions

Which of the following factors increase the heart rate?
$(A)$ Sympathetic nerve signals
$(B)$ Parasympathetic nerve signals
$(C)$ Adrenal medullary hormones
$(D)$ Vagus nerve
$(E)$ Thyroxine hormone
$(F)$ Acetylcholine

$A$ special neural centre that can moderate the cardiac function is located in

What is the effect of the parasympathetic nervous system on the heart rate?

Heartbeat increases due to the stimulation of:

The pacemaker stimulates:

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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: