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NROC64H3 Lecture Notes - G Protein–Coupled Receptor, Olfactory System, Taste Receptor

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Matthias Niemeier

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Nroc64 sensory motor system
Introduction to sensory and motor system
We have good understanding of the sensory side and some motor (like the coastlines of
a continent) but have missing and limited understanding of the middle parts.
Ramon y Cajal- brought the concept of the neuron
Simple minds – Studying simple brains allows more easier learning about system since
our brain is more complex.
Studying sensorimotor systems
– memory – learning
- e.g. you don't get burned on the same thing twice to learn not to touch it again
The chemical senses – the oldest senses
- gustation
– olfactory – smell helps on most identify things e.g. danger (survival)
– chemoreceptors
– salt, sour, sweet, bitter, umami
– molecules activate special receptors
– bitter – should be avoided – poison – survival – we learn to enjoy but primitive is
– taste in combination (not only sweet)
– but also use other senses e.g. taste and smell
The organ of taste
– Tongue, pallet, pharynx – all have taste receptors
– Tongue Is the organ of taste specifically papillae
– the tip of the tongue is sweetness
– papillae are used to increase the surface area of the taste on tongue
– tastebuds on the top or side of papillae
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