The second-messenger mechanism of hormone action operates by ________.
A) synthesizing more than one hormone at a time
B) increasing the basal metabolic rate in the target organ
C) altering gene expression in the nuclear DNA
D) binding to specific receptors and employing the services of G proteins and cAMP

Question

Quizplus · Accepted Answer

The second-messenger mechanism of hormone action involves binding to specific receptors on the cell surface, which then employ the services of G proteins and intracellular messenger molecules like cyclic AMP (cAMP) to activate a cascade of events within the cell. This results in the production of various intracellular second messengers that ultimately bring about the physiological response to the hormone signal. This mechanism is used by many hormones, including epinephrine, glucagon, and follicle-stimulating hormone.

The Second-Messenger Mechanism of Hormone Action Operates by ________