Vision

Question 1

Visible light propertieies

Answer 1

Amplitude= Brightness
Candellas/ m2`

Wavelength= color

Question 2

3 properties of light

Answer 2

Reflection
Absorption
Refraction

Question 3

Cone Types

Answer 3

blue
green
red

Question 4

Do rods see color?

Answer 4

no

Question 5

Cornea does

Answer 5

refracting power

Question 6

Lense does

Answer 6

under neural control

Focuses near or far

Question 7

To focus near

Answer 7

Lense needs to get fatter= Accommodation

Question 8

Zona fibers and ciliary muscles

Answer 8

unaccommodated= relaxed muscle

accommodate= ciliary contracts–> lens gets “fat”

Question 9

Organ of Corti and Lense have what in common?

Answer 9

No blood supply

Question 10

Pupil functions

Answer 10

↓ light entering the eye

Question 11

Lense problems

Answer 11

can’t see all colors @ every shape?

disruptive scattering?

Pupil helps this?

THIS CARD NEEDS WORK??

Question 12

Retina Structure

Answer 12

Photoreceptors are at the back

Retinal ganglia cells are in front of this

Question 13

PHOTOTRANSDUCTION

Answer 13

*Rhodopsin = opsin + retinal
~Opsin – 7 transmembrane spanning protein
~Retinal – light sensitive molecule

Light -> rhodopsin -> activates G-protein Transducin ->
activates cGMP phosphodiesterase -> hydrolizes cGMP

Question 14

Ultimately, light reduces concentration of ___________

Answer 14

cGMP