Which of the following is not involved in the signal transduction pathway for the detection of odorants?
A) A G protein
B) Adenylyl cyclase
C) A specific odorant molecule receptor
D) A gated ion channel in the endoplasmic reticulum
E) A cAMP gated ion channel

Question

Quizplus · Accepted Answer

Gated ion channels in the endoplasmic reticulum are not involved in the signal transduction pathway for the detection of odorants. Instead, odorant molecules bind to specific odorant receptors on the surface of olfactory receptor neurons, which activate a G protein signaling pathway that eventually leads to the opening of ion channels in the plasma membrane, generating a signal that is transmitted to the brain. Adenylyl cyclase and cAMP-gated ion channels are both involved in this pathway.

Which of the Following Is Not Involved in the Signal