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IO 117- Ch. 15 Special Senses with 100- correct answers(verified for accuracy)
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IO 117- Ch. 15 Special Senses with 100- correct answers(verified for accuracy)
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BIO 117- Ch. 15 Special Senseswith 100% correct
answers(verified for accuracy)
Mechanoreceptors - answer respond to touch, pressure, vibration,
stretch, and itch
chemoreceptors - answer like a lock & key, respond to chemicals
thermoreceptors - answer respond to changes in temperature
photoreceptors - answer respond to light
Nociceptors - answer pain receptors found everywhere in the body
except the brain
Name the 5 special senses - answer Olfactoin (smell)
Gustation (taste)
Vision (sight)
Auditory (hearing)
Equilibrium (balance)/vestibular sensation
How do special senses and general senses differ? - answer -special
senses rely on receptors that are not neurons (except for smell)
-special sensory organs are confined to the head so all info travels
on the axons of cranial nerves (not spinal nerves)
, olfactory epithelium - answer a thin layer of tissue, within the
nasal cavity, that contains the receptors for smell
Name and describe the 3 types of cells in the olfactory epithelium -
answer 1. modified bipolar neurons
2. chemoreceptors
3. basal cells: stem cells that replace olfactory neurons
What is the average lifespan of an olfactory neuron? - answer 30 to
60 days
Olfactory nerve - answer CN 1, combined axons of olfactory
neurons
olfactory bulb - answer structure that sits above the cribriform
plate of the ethmoid bone, inferior to the frontal lobe of the brain
olfactory tract - answer composed of axons that exit olfactory bulb;
travel to other regions of CNS for interpretation
odor fatigue - answer you become less sensitive to smells if you
have been stimulated by these smells for a period of time
What kind of receptors are stimulated for the gustatory sense? -
answer -chemoreceptors (both gustatory & olfactory)
-thermoreceptors
-nociceptors
-taste buds
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