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(D) Cardiac activity is regulated by both neural and hormonal mechanisms.$1$. Intrinsic regulation: The human heart is myogenic,meaning it is auto-reg

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All of the above.

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(D) Cardiac activity is regulated by both neural and hormonal mechanisms.$1$. Intrinsic regulation: The human heart is myogenic,meaning it is auto-regulated 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 $(ANS)$. Sympathetic nerves increase the rate of heartbeat,while parasympathetic nerves decrease it.$3$. Hormonal regulation: Hormones secreted by the adrenal medulla,such as adrenaline and noradrenaline,increase cardiac output and heart rate.Therefore,all the given statements are correct.

Select the correct option regarding the regulation of cardiac activity.

Similar Questions

Neural signals through ............ can increase the rate of heart beat,the strength of ventricular contraction and thereby the cardiac output.

$A$: The resting heart rate,about $75$ beats/minute,is usually lower than the autorhythmic rate of the $SA$ node ($90-100$ beats/minute).
$R$: At rest,the parasympathetic nervous system effects dominate the heart rate.

Heart beat decreases in the following conditions $EXCEPT$ . . . . . . .

Stimulation of the vagus nerve will make the heart beat

When the normal heart of a man is injected with a physiological concentration of adrenaline, it shows:

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