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12 Cards in this Set
- Front
- Back
Chemoreceptors
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-work by chemically bonding to the
stimulus -chemical must be in aqueous solution -ex: taste |
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Mechanoreceptors
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-work by physically deforming the
receptor to create the action potential -ex: discriminative touch, pressure, equilibrium, etc |
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Photoreceptors
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-respond to light
-will never adapt -ex: rods and cones |
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Nociceptors
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-tissue damage; pain
-will never adapt -ex: free nerve endings |
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Proprioceptors
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-stretching of tissue
-located in joints, tendons, and ligaments, etc |
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Osmoreceptors
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-sense of fluid pressure in the body
-ex: located in bladder, stomach, arteries, veins, etc |
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Exteroreceptors
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receptor located on or close to the surface
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Visceroreceptors
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receptor located in an internal organ
|
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Auditory Sense
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-mechanoreceptors
-connected to organ of corti -doesn't adapt too rapidly -pathway: organ of corti->cochlear nerve->vestibulocochlear nerve (CN VIII)->temporal lobe |
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Sense of Equilibrium/Balance
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-mechanoreceptors
-don't adapt -pathway:vestibule and 3 semicircular canals->vestibular nerve->vestibulocochlear nerve (CN VIII)->pons->part to brain and other part to spinal cord |
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Olfactory Sense
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-chemoreceptor
+chemical must dissolve in mucous +very sensitive; a few molecules are enough to create receptor potential +roughly 350 different chemical receptors in the nasal cavity +actual receptors are located in the cribiform plate ++highly perforated portion of hte ethmoid bone +pathway: olfactory nerve (CN I)->thalamus->parietal lobe |
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Gustatory Sense
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-chemoreceptor
+saliva and any liquid you ingest for chemicals to dissolve into -papillae +4 types: vallate, fungiform, and foliate (contain taste buds), and filliform (doesn't contain taste buds, but allow a sense of texture) -all taste is a combination of the 5 basic tastes (salty, sweet, sour, bitter, and umami) -touch, temperature, smell, and texture -pathway: anterior 2/3 of tongue (facial nerve CN VII)->posterior 1/3 of tongue (glossopharyngeal nerve CN IX)->epiglottis/pharynx (vagus nerve CN X)->parietal lobe |