PSYCH 2E03 Chapter 5: 5 Taste
25 Feb 2016
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Document Summary
Gustatory system (taste: detect airborne chemicals, closest relationship to emotional centre, best at evoking past memories, detect chemicals dissolved in saliva. Taste: what is palatable and what is not. Odours: sexual attraction pheromones, communication smell something burning. Taste receptors on the roof and back of our mouth + throat. Ones closer to the tip of the tongue = fungiform papillae (looks like mushrooms) Circumvallate papillae at the back of the tongue = very large grooves. Pores are made of microvilli, why are they there? o to increase the surface area. Receptor cells are not neurons but behave like neurons. Apical part of the taste bud (microvilli) is responsible for receiving the input, basal is responsible for sending (synapse) Salt: ion channels normally open (leaky channels: enters cell from electrical and concentration gradient. Acids: protons can go through sodium channels- mixed signals between sour and saltyo can flow through trp channels: acid itself can pass through lipid bilayer, separating into proton.
