BPK 306 Lecture Notes - Lecture 31: Granule Cell, Afferent Nerve Fiber, Olfactory Bulb
5 Dec 2017
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Depends on the presence of chemical stimuli present in food, drink, or in the air. The stimuli we know as taste (flavour) is a mixture of 5 elementary taste qualities: 5 taste receptors. Odor has more primary qualities than taste -> as many as 1,000 different odor receptors are present in humans. Olfactory coding resembles taste coding -> most natural odors consist of combos of molecules that excite chemoreceptors of more than one odorant class. 2: taste buds are innervated by 3 cranial nerve, xii facial nerve (anterior, x vagus (larynx, upper esophagus) Ix glossopharyngeal (posterior: upper esophagus also has taste buds. Taste buds consist of 3 types of cells: b = basal cells (basal = at the bottom, responsible for new chemoreceptors (only live ~10 days, r = chemoreceptor cells (receptor, have receptor molecules on the microvilli. 3: s = supporting cell, also respond to taste and provide support for receptors.
