When a normal heart is injected with a physio | vedclass

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(C) Adrenaline (epinephrine) is a hormone secreted by the adrenal medulla. It acts on the heart by binding to $\beta_1$-adrenergic receptors. This bin

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Sustained increased rate

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(C) Adrenaline (epinephrine) is a hormone secreted by the adrenal medulla. It acts on the heart by binding to $\beta_1$-adrenergic receptors. This binding increases the heart rate (positive chronotropic effect) and the force of contraction (positive inotropic effect). When a physiological concentration is injected,it leads to a sustained increase in the heart rate to support the body's 'fight-or-flight' response.

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

Similar Questions

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:

The pacemaker stimulates:

Stimulation of the vagus nerve will make the heart beat

What happens to the heart of a frog when the vagus nerve is stimulated?

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

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