When a normal heart is injected with a physio | vedclass

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Question

(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

An increase in blood flow to the atria of the heart can cause the release of ............ and it causes ............ in blood vessels.

How is the regulation of cardiac activity performed?

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

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Assertion $(A) :-$ Parasympathetic neural signals decrease the cardiac output.
Reason $(R) :-$ Parasympathetic neural signals decrease the rate of heartbeat and the speed of conduction of action potentials.

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