Sensory - Sight and Touch Flashcards
(21 cards)
Types of Mechanoreceptors
Pacinian Corpuscles, Merkel’s Light disks (tactile disks), and Messiner’s Corpuscles
Pain Receptors
Nociceptors - free or “naked” dendrites in the skin
Chemoreceptors
Gustatory (Taste), and Olfaction (smell)
Thermoreceptors
End bulb of Krause (cold), And Ruffini’s end organ (heat)
Function of Proprioreceptors
Sense of body’s position in space
Function of Pacinian Corpuscles
pressure/sustained touch
Function of Merkel’s Light disks (tactile disks), and Messiner’s Corpuscles
Discriminative/Light touch
Sclera
White of the eye
Cornea
Transparent part of the sclera
Choroid
Night shin pigment on inner eye layers
Pupil
hole in the iris
iris
Pigmented outer layer of eye
lens
focuses light. Located behind cornea
Ciliary body
Produces clear watery fluid that fills up space between the cornea and lens
aqueous humor
clear fluid made by ciliary bodies.
Vitreous Humor
jelly like substance
Retina
Innermost layer contains rods and cons
rods
black and white
Cones
color vision; most numerous near fovea. Less common in humans than other animals
fovea
center of visual field where humans see sharpest and have the most cones
blind spot
where optic nerve leaves eye