When adenylate cyclase is activated by a hormone,the concentration of cyclic AMP increases in the cell even though the hormone does not enter the cell.This is an example of the __________________ mechanism of hormone action.
A)altering membrane transport
B)altering activity of DNA
C)second messenger
D)all of the above answers are correct

Question

Quizplus · Accepted Answer

When adenylate cyclase is activated, it produces cyclic AMP which acts as a second messenger inside the cell without the hormone entering the cell. Therefore, this is an example of the second messenger mechanism of hormone action. Options A and B also describe mechanisms of hormone action, but they are not relevant to this specific example. Therefore, D is incorrect as it includes all options.

When Adenylate Cyclase Is Activated by a Hormone,the Concentration of Cyclic