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12 Cards in this Set

  • Front
  • Back
Chemoreceptors
-work by chemically bonding to the
stimulus
-chemical must be in aqueous solution
-ex: taste
Mechanoreceptors
-work by physically deforming the
receptor to create the action potential
-ex: discriminative touch, pressure,
equilibrium, etc
Photoreceptors
-respond to light
-will never adapt
-ex: rods and cones
Nociceptors
-tissue damage; pain
-will never adapt
-ex: free nerve endings
Proprioceptors
-stretching of tissue
-located in joints, tendons, and
ligaments, etc
Osmoreceptors
-sense of fluid pressure in the body
-ex: located in bladder, stomach,
arteries, veins, etc
Exteroreceptors
receptor located on or close to the surface
Visceroreceptors
receptor located in an internal organ
Auditory Sense
-mechanoreceptors
-connected to organ of corti
-doesn't adapt too rapidly
-pathway: organ of corti->cochlear nerve->vestibulocochlear nerve
(CN VIII)->temporal lobe
Sense of Equilibrium/Balance
-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
Olfactory Sense
-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
Gustatory Sense
-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