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create a schematic that shows how we sense the smell of something

create a schematic that shows how we sense the smell of something
Science   Anatomy-And-Physiology   
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Answer #1

The chemical molecule from a substance travels through air

It enters the nostril and comes in contact eith olfactory surface membrane

It diffuses into the mucus and binds with the receptor protein(G protein coupled receptor) in the membrane of olfactory cilium

Activation of adenylyl cyclase

cAMP formation

cAMP activated gated sodium ion channel

Sodium ion enters and action potential is generated in the olfactory bulb

This leads to excitation of olfactory neuron

The olfactory nerve carries the action potential to the central nervous system

The olfactory tract enters brain at anterior junction between mesencephalon and cerebrum

Then it divides into two pathways--Medial olfactory area and lateral olfactory area

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