PSYC1002 Lecture Notes - Lecture 32: Dimensionality Reduction, Lingual Papilla, Quinine

• School: University of Sydney
• Department: Psychology
• Course: PSYC1002
• Professor: Caleb

Document Summary

Taste: anatomy and physiology: papillae: gives the tongue its bumpy appearance (four types, three contain taste buds), filiform: no taste function, located at the tip of tongue. Draws in food and acts as an abrasive (most numerous: fungiform: (resembles tiny mushroom), visible to eye on anterior portion of tongue. Huge variation between people: foliate: sides of the tongue; look like folds, taste buds buried in the folds (circum)vallate: large visible structures like an inverted v on back of tongue. Look like islands surrounded by moats: also taste buds on the roof of mouth where soft and hard palates meet. Taste: chemical molecules make direct contact with chemoreceptors on our tongue. Identified using 6-n-propylthiouracil (prop: cross-model matches to a bitter chemical (prop, prop non-taste(cid:396)s te(cid:374)d to (cid:271)e the f(cid:396)e(cid:374)(cid:272)h! It is pain and temperature from chemosensory irritation signalled by the trigeminal nerve! Smell (olfaction: distance sense: olfaction provides information about chemicals suspended in the air around us, dogs vs.