Question -
_____ is the secondary messenger utilized by ACTH, FSH, LH and calcitonin hormones.
Options:
A .  cAMP
B .  cGMP
C .  Calcium
D .  A, B and C
Answer: Option D : D Secondary messengers are low-weight diffusible molecules that are used to relay signals within a cell. They are synthesized or released by specific enzymatic reactions, usually as a result of an external signal that is received by a transmembrane receptor. cAMP, cGMP and Ca2+ act as secondary messengers and are located in the cytoplasm. The hormones ACTH, FSH, LH, PTH, glucagon, and calcitonin - all utilize the cAMP pathway
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