PSY100H1 Study Guide - Vestibulocochlear Nerve, Chorda Tympani, Cranial Nerves
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PSY100H1 Full Course Notes
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Document Summary
Olfaction and gestation are grouped together as chemical senses, and in terms of physiology, two sensory systems are in some ways quite similar. Taste serves most specific function of any of senses discerning which chemicals we need to ingest because they are nutritious and which we need to spit out because they may be poisonous. Molecules we taste are dissolved in saliva and passed over taste receptors on taste buds. When we chew and swallow foods, molecules are released into air inside mouths and forced up behind palate into nasal cavity. Retronasal olfactory sensations: sensation of odor that is perceived when chewing and swallowing force an odorant in mouth up behind palate into nose. Odor sensations are perceived as originating from mouth, even though actual contact of odorant and receptor occurs at olfactory mucosa. Flavor: combination of true taste and retronasal olfaction. Foods perceived by somatosensory system via touch, temperature, and pain receptors in tongue and mouth.
