Biology

The correct answer is: A.Relay the message from the inside of the membrane throughout the cytoplasm.

Explanation:

Second messengers are small molecules that are produced or released in response to receptor activation and serve to relay the signal from the cell membrane to various intracellular targets, amplifying and spreading the signal throughout the cytoplasm. Common second messengers include molecules like cyclic AMP (cAMP), calcium ions (Ca²⁺), and inositol trisphosphate (IP3).

Here’s why the other options are less accurate:

B.Transport a signal through the lipid bilayer portion of the plasma membrane: Second messengers generally work inside the cell, no...