PSYC 367 Lecture Notes - Taste Bud, Taste Receptor, Afferent Nerve Fiber
Document Summary
Tongue map: different section of the tongue responsible for different taste. Instead, we have receptors for all different tastes located all over our tongue. The tongue: fungiform papillae (cluster of taste buds. How taste cells transduce taste into neural signal: Transduction: generic cell-- there"s microvilli, nucleus, but it"s not a neuron, so no action potentials, but will release neurotransmitters to an afferent nerve, and the release will be provoked by an influx of calcium; 5 pure tastes: defined by the 5 tastes receptors; the input source must be water soluble or else we won"t taste it. Receptors either is coupled to an ion channel itself or to g-protein (second messenger): activating the channel that is coupled to g-protein will lead metabolic changes in the cell. Those metabolic changes are then going to affect depolarization: sweet: sugar molecule comes in binds to some sweet receptor the. Chorda tympani: part of one of three cranial nerves that are involved in taste.
