In the odorant cells of mammals, specific odorants are detected by binding to ________.
A) G protein-coupled receptors.
B) ligand-gated ion channels
C) acetylcholine receptors
D) glutamate receptors

Question

Quizplus · Accepted Answer

Odorants in mammals are detected by binding to G protein-coupled receptors (GPCRs) located on the cilia of odorant cells. The binding of odorants to GPCRs leads to the activation of a signaling cascade that ultimately generates an action potential in the olfactory nerve. Therefore, choice A is the correct answer. Ligand-gated ion channels, acetylcholine receptors, and glutamate receptors are not involved in the detection of odorants in the mammalian olfactory system.

In the Odorant Cells of Mammals, Specific Odorants Are Detected