receptors

Cards (7)

structure of pacinian corpuscle
single sensory neuron wrapped in layers of connective tissue (lamellae)
how does pacinian corpuscle respond to a stimulus
causes cell membrane to deform and stretch mediated sodium ion channels widen allowing sodium ions to diffuse into the cell establishing generator potential
2 types of photoreceptors
rods & cones
where is a rod located
retina
where is a cone located
fovea
summary of rods
rods:
rhodopsin
low visual acuity
high visual sensitivity
information in black & white
multiple rod cells to 1 single bipolar cell
(spatial summation) - enough neurotransmitters to reach threshold
summary of cones
cones:
iodopsin
3 types - red-sensitive, blue-sensitive, green sensitive
high visual acuity
information in colour
one cone cell to 1 single bipolar cell (no spacial summation)