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Nutrition in Neuroscience Part 3 | Mastering Nutrition #42

Mastering Nutrition

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What Is the Mechanism of Our Sensation of Odor?

There are 950 odorant receptor genes in humans. About 40% of them are expressed. The olfaction mechanism is very similar to how light affects the photoreceptors in the eyes. An odorant binds to a receptor, which activates a protein called G sub-ulph. This causes you to take AMP and make cyclic AMP. That activates a channel that brings sodium and calcium into the cell. And then there's taste. We have just five classes of taste receptors. Tastes for salty, sour, sweet, bitter, and umami.

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