Lab 3 - Sensory Receptors Flashcards
four things that we have receptors for
touch, pain, hot, cold
four types of receptors
tactile, thermal, nociceptors, proprioceptors,
receptor for mechanical pressure
tactile
receptor for warm and cold
thermal
receptor for pain
nociceptor
receptor for position and movement
proprioceptors
two pathways for transmission of sensory signals
anterolateral, dorsal
pain and crude touch sensory pathway
anterolateral
touch and pressure sensory pathway
dorsal
dorsal pathway runs up blank lateral then crosses over in blank
dorsal, medulla
sensory cortex that has discrete areas that receive somatic, visual, auditory, and gustatory sensations
neocortex
neocortex also has areas for control of blank
movement
neocortex receptors are not blank
evenly distributed
two types of special senses
photoreceptors, auditory receptors
in the eye, light waves change blank via blank
membrane potential, photoreceptors
photoreceptor at night and low in detail
rods
photoreceptor during day and high in detail and color
cones
area of best vision
fovea
distant objects… the lens ciliary muscles blank, lense becomes blank, and suspensor ligament gets blank
relax, thinner, tight
close objects… the lens ciliary muscles blank, lens becomes blank, and suspensor ligament gets blank
contract, fatter, loose
adjustment of focus to compensate for distance
accomodation
minimum distance you can focus and gets greater with age
near point discrimination
lens becomes less elastic and difficult to focus near images
presbyopia
near sightedness
myopia
far sightedness
hyperopia
eyeball is too blank in near sightedness… blank lenses fix this, and image is focus in blank of fovea
long, concave, front
eyeball is too blank in far sightedness… blank lenses fix this, and image is focus in blank of fovea
short, convex, back
ear transduces sound waves to blank
mechanical
blank cells in ear respond to mechanical waves
hair
sound wave of one frequency
tone
how we measure sound intensity
decibel
