__________ do(es) not use a second messenger system.
A)ACTH
B)Steroid hormones and TH
C)Glucagon
D)Most hydrophilic hormones
E)Only a few lipophilic hormones

Question

Quizplus · Accepted Answer

Steroid hormones and TH are lipophilic and can easily pass through the cell membrane to bind with intracellular receptors to initiate gene transcription, thus they do not require a second messenger system. ACTH and glucagon, on the other hand, are hydrophilic and require a second messenger system to initiate intracellular signaling. Most lipophilic hormones also do not require a second messenger system.

__________ Do(es) Not Use a Second Messenger System