Question

Which among the following is a second messenger generated when hormone interacts with membrane-bound receptors?

• A. Cyclic AMP
• B. Insulin
• C. $T_3$
• D. Gastrin

Answer 1

The correct option is A Cyclic AMP

Cyclic AMP is the second messenger generated when hormone interacts with membrane-bound receptors and this in turn regulates cellular metabolism.

The other three options are incorrect as insulin regulates glucose metabolism. $T_3$ 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.