BPK 205 Lecture 14: Chemoreception and Auditory Senses
29 Oct 2017
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Document Summary
The olfactory system: olfactory tract = bundle of axons, olfactory neurons = neuronal receptors -> no special receptors, olfactory cortex -> signal goes straight here, does not travel through thalamus. Olfactory neurons: pink cells = support or stem cells, olfactory neurons can regenerate = stem cells are present. Signal transduction: cyclic nucleotide gated = cng, golf = g protein that is specific to the olfactory system, works similar to gs. Intracellular signaling pathway is different for each type of taste cell. 3: *taste pore = the only spot available for the taste ligand to bind, sweet, umami, bitter = type ii receptor cells, release atp to cause ap in 1st degree neuron, sour (ex. Acidic/citrus) = type iii cells: activated by h+ (related to acidity, type iii cells are non-neuronal -> release serotonin (nt) to produce ap in 1st degree neuron.
