Chapter 17-19 study quide

Chapter 17-19 study quide - Chapter 17 Special senses-smell...

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Chapter 17 Special senses-smell, taste, vision, hearing, equilibrium-in complex sense organs Olfaction: Smell Olf.receptors :1 st order~bipolar~in olf.epithelium<sup. nasal cavity>exposed knob shaped dendrite, axon project through cribriform plate and end in olf bulb. Respond to stim of ordorant by produce gener potent, intiating olf response. Convey impulse to R/L nerves<I>, olf bulbs, olf tracts, cerebral cortex, limbic. Olf Hairs: site of transduction:conversion of stimulus energy into a graded potential in a sensory receptor. Support cells:epi. of mucus memb. lining nose. Give supp.nourish.elect.insulat.detox chem. Basal stem cell:produce new olf. receptors. Between supp.cells. Constant divide. Olf Glands: produce mucus, carried by ducts, to dissolve odorant Adaption:Quick. Threshold: low Gustatory:Taste Sour, sweet, bitter, salty, unami Gust receptor cells in taste buds on soft palate, tongue, pharynx, epiglottis. Convey impulse to nerves 7, 9, 1O. Nerves carry from recept to medulla, thalamus, and pariet lobe of cerebral cortex. Taste buds<epi> consist of supp, gust receptor, basal. Found in papillae
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