AP BIOLOGY

THE CELL

CELL COMMUNICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is an example of a second messenger?
A
cAMP
B
GTP
C
insulin
D
epinephrine
Explanation: 

Detailed explanation-1: -Examples of second messenger molecules include cyclic AMP, cyclic GMP, inositol triphosphate, diacylglycerol, and calcium.

Detailed explanation-2: -Cylic AMP (cAMP) is a water-soluble second messenger found in eukaryotic and prokaryotic cells. The intracellular concentrations of cyclic AMP are approximately 0.1-1.0 M, increasing 20-fold within seconds of activation.

Detailed explanation-3: -The primary function of a second messenger is to amplify the signal of a first messenger such as a hormone. Examples of second messengers are cyclic AMP (cAMP), inositol triphosphate, and calcium. While second messengers are usually intracellular, first messengers are usually extracellular molecules such as hormones.

Detailed explanation-4: -FSH and its second messenger cAMP stimulate the transcription of human anti-Müllerian hormone in cultured granulosa cells.

There is 1 question to complete.