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Physiology of Sensations
physiology of sensations
37
Biology
Undergraduate 1
02/11/2015

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Term
Exteroreceptors
Definition
at or near BODY SURFACE, stimuli outside body (transmit hearing, sight, smell, taste, touch, pressure, pain, temp)
Term
Interoreceptors
Definition
BLOOD VESSELS AND VISCERA, pressure, pain, fatigue, hunger, thirst, and nausea
Term
Mechanoreceptors
Definition
detect MECHANICAL OR PHYSICAL deformation of receptor or adjacent cells
Term
Thermoreceptors
Definition
detect changes in TEMPERATURE
Term
Nociceptors
Definition
detect PAIN
Term
Photoreeptors
Definition
detect LIGHT on retina
Term
Chemoreceptors
Definition
detect TASTE in mouth, SMELL in nose, CHEMICALS in body fluid
Term
Simple Receptors
Definition
modified dendritic endings of sensory neurons, GENERAL SENSES, TACTILE SENSATIONS
Term
Complex Receptors
Definition
sense organs comprised of a variety of cells that work together to accomplish SPECIFIC receptive processes
Term
Cutaneous Sensations
Definition
tactile sensations, PUNCTUATE DISTRIBUTION, over body surface
Term
Merkel Discs
Definition
attached to base of epidermis, SLOW TO ADAPT
Term
Root Hair Plexus
Definition
entwine hair follicles, detect bending of hairs, ADAPT RAPIDLY
Term
Krause's End Bulbs
Definition
variation of Meissner's Corpuscles, CT of mucousae
Term
Ruffini's Corpuscles
Definition
deep, continuous pressure, ADAPT SLOWLY, numerous dendritic endings in flat capsule
Term
Olfactory Epithelium
Definition
pseudostratified, smell
Term
Cone Cells
Definition
low sensitivity to light, color vision
Term
Rod Cells
Definition
night vision/peripheral vision
Term
Protanopia
Definition
can't see red
Term
Deuteranopia
Definition
can't see green
Term
Trtanopia
Definition
can't distinguish between blue and yellow
Term
Positive/Negative Afterimage
Definition
POSITIVE-cover eyes, see bright blob
NEGATIVE- look at light background, see dark blob
Term
Optic Disk
Definition
where nerve fibers of the retina leave the eye and enter the optic nerve
Term
Blind Spot
Definition
region of retina insensitive to light
Term
Astigmatism
Definition
unequal curvatures in diff parts of cornea or lens cause light to converge unevenly and cause distorted/blurred vision
Term
Ossicles
Definition
3 small ear bones (malleus, incus, stapes)
Term
Malleus
Definition
hammer
Term
Incus
Definition
anvil
Term
Stapes
Definition
stirrup
Term
Cochlea
Definition
coiled organ, part of the ear involved in hearing
Term
Nerve Deafness
Definition
damages hair cells of cochlea or cranial nerve VIII damages
Term
Conduction Deafness
Definition
damage to eardrum or ossicles
Term
Rinne test
Definition
tuning fork to mastoid, NERVE DEAFNESS
Term
Weber test
Definition
tuning fork to middle forehead, CONDUCTIVE IMPAIRMENT
Term
Vestibular Apparatus
Definition
semicircular canals and vestibule
Term
Static Equilibrium
Definition
linear changes in speed/direction, vestibule
Term
Dynamic Equilibrium
Definition
rotational movements, semicircular canals
Term
Semicircular Canals
Definition
lateral/horizontal, anterior/frontal, posterior/inferior
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