How smell works
- Odour molecules that move through the air up your nostrils will bind to special smell receptors on the surface of nerve cells.
- The nerve cells send a signal to the brain's olfactory bulb, that is behind the bridge of the nose.
- People have about 400 different smell receptor types.
- The odour molecules create a pattern of activation in the nerve cells that the brain translates as a smell.
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The Memory Association
According to a 2004 research, the sense of smell is a complicated process.
- The olfactory receptor cells send a neuron signal to a part of our brain which is called the olfactory bulb.
- This multistep process which involves over a thousand genes and the nerves connect...
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