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What happens when an odorant binds to receptor proteins? a. action potential fires b. receptor membrane...

What happens when an odorant binds to receptor proteins?

a. action potential fires

b. receptor membrane potential depolarizes

c. Na+ and Ca2+ channels open

d. All of the answers are correct.

Science   Anatomy-And-Physiology   
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Answer #1

D..All the answers are correct

◆When an odorant binds to receptor protein, it activates G protein binded to the receptor .

◆It helps in the activation of adenylyl cyclase (it is an enzyme).

◆Adenylyl cyclase converts ATP to cyclic AMP (cAMP)-second messenger.

◆This opens Na+ and Ca2+ channels, which reduces potential across plasma membrane.

◆This generates action potential of this depolarisation reaches threshold.

◆Now it is conducted to the brain through olfactory nerve.

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