Question

multiple select question select all that apply which of the following structures serve as second messengers in the body? calcium cyclic amp peptide hormones ach

Explanation:

Calcium and cyclic AMP are well - known second messengers in cellular signaling pathways. Peptide hormones are first messengers that bind to cell - surface receptors to initiate a signaling cascade leading to the production of second messengers. Acetylcholine (Ach) is a neurotransmitter and not a second messenger.

Answer:

A. calcium
B. cyclic AMP