Question

Which autonomic receptor mediates secretion

of epinephrine by the adrenal medulla?
(A) Adrenergic a receptors
(B) Adrenergic B1 receptors
(C) Adrenergic B2 receptors
(D) Cholinergic muscarinic receptors
(E) Cholinergic nicotinic receptors

Answer 1

The autonomic receptor that mediates the secretion of epinephrine by the adrenal medulla is the Adrenergic B2 receptors. The correct option is C).

Step-by-step explanation:

The autonomic receptor that mediates the secretion of epinephrine by the adrenal medulla is the Adrenergic B2 receptors.

Epinephrine acts through the alpha and beta receptors, and in this case, it primarily acts through the beta-2 receptor located in the adrenal medulla. The binding of epinephrine to the beta-2 receptor triggers the release of epinephrine from the adrenal medulla into the bloodstream.

This process is part of the body's fight-or-flight response and helps prepare the body for stressful situations by increasing heart rate and mobilizing energy reserves. Option c) is the correct one.