Chapter 9 - Light Detection

purple

which color has the lowest wavelength?

red

which color has the highest wavelength?

photons

packets of energy which act as particles and waves

brightness

this feature of light is determined by the number of photons emitted by a source

color

this feature of light is related to the frequency/wavelength

black

under a green light, a red apple would appear what color?

cornea

light first enters this feature of the eye, it refracts light onto the retina

globular

for focusing on something close the lens takes on what shape?

flat

for focusing on something far away the lens takes on what shape?

cilliary

this muscle is responsible for lens accomidation

F

T/F: photoreceptors (rods/cones) are neurons

scotopic

relating to vision in dark environments, mainly rods

photopic

relating to vision in bright environments, mainly cones

RGB

what 3 colors can cones see?

peripheral

rods are more common in what part of the retina?

fovea

the center of the retina

center

rods are more common in what part of the retina?

rods

these photoreceptors are more sensitive to light

cones

these photoreceptors are more sensitive to wavelength

inhibits

light binding to photoreceptors does what to glutamate release?

graded potentials

this feature of photoreceptors is what makes them not classified as neurons

specific ranges of wavelengths

while operating similar to rhodopsins, photopsins are deformed by what (instead of just the presence of any light)

bipolar cells

photoreceptors release glutamate onto what kind of cells?

ganglion cells

bipolar cells synapse onto what?

optic nerve fibers

the axons of ganglion cells form what?

horizontal cells

these cells contact photoreceptor and bipolar cells

amacrine cells

these cells contact bipolar and ganglion cells

on-center BP cells

these bipolar cells depolarize when a light turns on in the center of their field

off-center BP cells

these bipolar cells hyperpolarize when a light turns on in the center of their field