PSYC 212 Lecture Notes - Lecture 7: Sensory Analysis, Ion, Ventral Posteromedial Nucleus
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When think about taste, not only salty: multiple qualities. : how is it sensed ? mechanoreceptors on the tongue. Ca(cid:374)"t si(cid:373)pl(cid:455) look at the (cid:272)o(cid:373)pou(cid:374)d a(cid:374)d sa(cid:455) : it has ____ it is goi(cid:374)g to (cid:271)e salty. Diff compound can have very similar taste sensation: diff to k(cid:374)o(cid:449) (cid:449)hat it"s goi(cid:374)g to taste. Taste buds inside papillae: protected from surface of the tongue. Not all of these cells seem to have an axon coming out of them. Ion sensors: allowing large ions through, membrane potential of cell can change, proton/sodium competition. Does(cid:374)"t taste (cid:894)e(cid:454). (cid:448)i(cid:374)ega(cid:396) o(cid:374) potato, can put a lot of salt and (cid:449)o(cid:374)"t taste(cid:895) Non-ionic sensors: protein express of the surface, attach itself to sugar/salty/umami compound: Only presynaptic neurons (sensitive to ions, ion channel) (can response to salt and acidity) ca send signals to the cranial nerves (to the brain) 2 mechanisms: atp picked up by free nerve ending or not.
