In the mechanism of action of a protein hormone, one of the second messengers is

(a) Cyclic AMP

(b) Insulin

(c) $T_{3}$

(d) Gastrin

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Solution

Correct option (a)

Cyclic AMP is one of the second messengers involved in the action of a protein hormone. The other three options are incorrect as Insulin regulates glucose homeostasis.

$T_{3}$ regulates the metabolic rate of the body and thus. helps in maintaining Basal Metabolic Rate (BMR)

Gastrin is a peptide hormone, that stimulates the secretion of hydrochloric acid and pepsinogen.

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