BPK 205 Lecture Notes - Lecture 14: Tympanic Duct, Cochlear Duct, Vestibular Duct
5 Nov 2017
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Document Summary
Describe the basic structure and function of the: olfactory system: Functional anatomy of olfactory receptors + signal transduction pathway of the olfactory system + Nerve i) in olfactory bulb information moves through olfactory bulb olfactory tract. Olfactory cortex cerebral cortex and/or limbic system (bypasses thalamus: gustatory system, functional anatomy of the gustatory system. Taste buds composed of 50-150 taste cells joined near the apical surface with tight junctions. Tight junctions only at apical surface makes the taste bud shape egg-like (rounder bottom + pointy-er top) Types of tastant receptors and taste transduction. Taste transduction each taste cell sense only one type of ligand (taste molecule: ligand binds to receptor (gpcrs on type 2) or enters through channel (for types 1&3) Gpcr activate pathways ca2+ signal in cytoplasm trigger exocytosis or atp formation neurotransmitter or atp released on to p neurons p neurons fires ap . Ap sent to brain through cranial nerves (glossopharyngeal [ix]: auditory system.
