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68 Cards in this Set
- Front
- Back
change in environment
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stimulus
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what kind of receptors respond to pain?
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nociceptors
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sensing a stimulus as being from the body
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projection
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changing of stimulus into neural impulse
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transduction
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impulse travels along sensory pathway to brain
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transmission
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difference in perceptions based on comparisons
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contrast
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where are Krause's end bulbs found?
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nasal epithelium
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intensity is coded by rate of impulse firing?
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sensory coding
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where the stimulus arrives is called?
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homunculus
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susbstance P _____ pain
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facilitate
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smell structure?
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olfactory epithelium
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endorphins _____pain
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inhibit
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Glutamate _______pain
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facilitate
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Enkaphalins _______pain
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inhibit
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what part of the NS do pain inhibitors work
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CNS
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fast pain fibers
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type a
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slow pain fibers
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type c
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medicine that mimics endorphins
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morphine
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medicine that blocks sensory pathways
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lidocaine
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chemical must be _____to enter nasal cavity
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volatile
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what you taste is ____% of what you smell
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80
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mucous membrane of back of eyelid
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conjuctiva
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tear glands
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lacrimal apparatus
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______fluid contains antibacterial antibodies and lysozymes
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lacimal
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colored portion of eye
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iris
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whites of eyes
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sclera
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clear covering in front of eye
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cornea
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what part of the eye retracts light
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cornea
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the 2 types of photoreceptors
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rods and cones
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what part of the eye controls pupil size
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iris
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what photorecptors detect color and function in bright light
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cones
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what photorecptors detect light/dark and function in dim light
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rods
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point where optic nerve and blood vessels enter eye
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optic disk
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bipolar cells are ______neurons
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sensory
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pressure buildup due to poor humor circulation
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glaucoma
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region of very high acuity
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fovea centralis
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______ ________ maintains pressure which holds retina in place
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vitreous humor
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when the retina is not in place it is known as ?
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detached retina
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relaxation causes pupils to ______.
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consrict
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stress causes pupils to _______.
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dilate
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what is the term for near sightedness?
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myopia
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what is the term for far sightedness?
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hyperopia
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what is the term for normal vision?
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emmetropia
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outer layer of eye
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fibrous outer tunic
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middle layer of eye
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vascular middle tunic
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inner most layer of eye
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sensory inner tunic
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what structure holds lens in place and stretch it thin
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suspensory ligaments
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instrinic eye muscles that oppose ligaments
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ciliary muscles
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what part of the eyes are able to change focal points of vision?
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lens
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the innermost layer of the eye is also known as
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retina
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vitamin a derivative
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retinal
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what vision disorder is caused by a vitamin deficiency and impaired rods and what vitamin
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night blindness and vitamin A
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when rods shut down and cones take over this is known as
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bleach out
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lack of one or more cones would lead to?
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color blindness
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ringing in ears is called?
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titinus
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the vestibule, the maculae, utricle, and saccule are responsible for?
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static equilibrium
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what part of the ear is responsible for dynamic equilibrium
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crista ampularis of semicircular canals
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what is the hearing portion of the ear?
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cochlea
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ear drum is called?
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tympannic membrane
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jerky eye movements after rotation?
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nysatgmus
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problems in outer or middle ear is ________ deafness?
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conduction
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________deafness results from problems in cochlea or nerve.
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sensorineual (nerve)
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the organ of corti is the _______for ______
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sensory for sound
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the muscles tensor tympani and stapedius function to
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reduce sound transmission to inner ear
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hammer, anvil and stirrup are known as the
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ossicles
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bony labyrinth is filled with fluid ...
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perilymph
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________tube maintains pressure equilibrium.
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auditory (eustachian)
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inner membranous labyrinth is filled with
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endolymph
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