When the effects of water-soluble hormones on their target cells are considered, the hormone itself is
A) the G protein.
B) the second messenger.
C) the first messenger.
D) the hormone-response element.
E) the phospholipase.

Question

Quizplus · Accepted Answer

Water-soluble hormones act as the first messenger, binding to receptors on the cell surface and triggering a cascade of intracellular events.

When the Effects of Water-Soluble Hormones on Their Target Cells