Which of the following is an example of a second messenger?

Question

Quizplus · Accepted Answer

All of the options listed (cAMP, cGMP, and calcium ion) are examples of second messengers. Second messengers are molecules that relay signals triggered by a ligand binding to a receptor on the cell surface. After the receptor is activated, the second messenger is produced, leading to a cellular response. In the case of cAMP and cGMP, these are cyclic nucleotides that are synthesized from nucleotides by enzymes called adenylate cyclase and guanylate cyclase, respectively. On the other hand, calcium ion functions as a second messenger by binding to intracellular regulatory proteins, which then trigger cellular responses.

Which of the Following Is an Example of a Second