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sensory receptors/ gross and microscopic anatomy of the eye…
sensory receptors/ gross and microscopic anatomy of the eye
chemoreceptor
sensitive to chemicals light smell and taste
fibrous layer
cornea
is the black color in our eye, absorbs light and prevents it from scattering
sclera
white of our eye, goes all the way around
thermoreceptors
is sensitive with cold and warm
photoreceptors
is sensitive with light
cons
sensitive to color
rods
sensitive to light
nociceptor
comes from the word noxious, sensitive to pain
mechanoreceptor
sensitive to touch, pressure, and vibration. physical things
baroreceptor
special mechanoreceptor that measure blood pressure
inner layer- retina
tan in color, location of our photoreceptors
lens
focus light on retina, behind iris
iris
anterior to lens, color part of our eye, is a sphincter muscle
optic disc
no photoreceptor's, "blind spot"
macula lutea
posterior pole. when light goes in the pupil directs light to opposite end of the eye
fovea centralis
light is focused here, clearest vision, only cones
posterior segment
filled with vitergous humor, viscous liquid (thick) supports retina and lens, maintains pressure in eye
anterior segment
filled with aqueous humor, maintain pressure in the eye, nourish lens and cornea, posterior segment to cornea
based on their stimulus
Interceptors
sensitive to stimuli from internal organs
proprioceptors
sensitive to stimuli from muscle, tendons, ligaments and joints, tells CNS about our environment
Exteroceptors
sensitive to stumuli from environment (taste, hearing, smell)
vascular layer- corrinoid
keeps light from scattering and nourishes the other layers especially the retina