The cell surface receptors that can act only indirectly on plasma membrane-bound enzymes or ion channels are called:
A)G protein-coupled receptors.
B)gated ion channels.
C)enzymatic receptors.
D)second messenger receptors.

Question

Quizplus · Accepted Answer

G protein-coupled receptors (GPCRs) can only indirectly act on plasma membrane-bound enzymes or ion channels through a signal transduction pathway involving G proteins and second messengers. GPCRs are also known as seven-transmembrane receptors because they span the plasma membrane seven times. GPCRs are the largest family of cell surface receptors and are involved in a wide range of physiological processes, including sensory perception, neurotransmission, hormone signaling, and immune response.

The Cell Surface Receptors That Can Act Only Indirectly on Plasma