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12 Cards in this Set
- Front
- Back
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Chemical senses
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Taste and smell
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Gustatory
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Taste impulse, goes to brainstem via three cranial nerves
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Olfactory
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Smell impulse
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Taste buds
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Located on the tongue, soft palate, and epiglottis; composed of approx 40 epithelial cells
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Taste pore
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Outer surface of taste bud, microvilli (taste hairs) protrude from
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Taste receptors
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On taste hairs, which are on taste pore
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Umami
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Taste of glutamate...savoriness
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Taste sensations
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Sweet, salty, sour, bitter, umami
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Taste buds respond to
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All four (or five) stimuli, but to one or two preferentially
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Olfactory membrane
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Upper part of nostrils, area of about 5cm^2
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Olfactory receptors
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Specialized neurons, cilia project from
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Mechanism of smell sense
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Odorous substances bind to receptors in cilia, depolarizing olfactory receptors, axons join to form olfactory nerve, projects directly to olfactory bulb at base of brain
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