vision

Question 1

rods

Answer 1

most numerous
dim light= single photon
- monochromatic

Question 2

fovea cluster

Answer 2

only cones

1 cone: 1 ganglion

Question 3

Retina organization

Answer 3

rod and cone

- light from rear= backwards

Question 4

evagination

Answer 4

hypothesis about why light is processed from the rear

• to become hollow or dipping in the tube
• developing pouch inverts the receptors

Question 5

photoreceptor transduction

Answer 5

1. light photon strikes cone or rod
2. cleaves rhodopsin into retinal and opsin
3. opsin closes Na + gate
4. stops glutamate release

Question 6

color

Answer 6

see from 400-700 nm

- wavelength

Question 7

cones

Answer 7

• used to see color
• 3 types of cones
• trichromatic (code for 3 colors to make all colors )as well as honeybees

Question 8

opponent process coding

Answer 8

color comes in opponent pairs

- neuron excited by A is disinhibited by B

Question 9

lateral inhibition

Answer 9

• intesifies differences in visual fiels
• ganglion cells inhibits neighbors
• each boundary line is sharpened
• difference is doubled after ratio

Question 10

receptive fields

Answer 10

ganglion cell will fire when exposed to light in its receptive field
- surround is inhibited

Question 11

parvocellular

Answer 11

see color and have very small receptive fields

Question 12

magnocellular

Answer 12

in peripheral,

• monochrome and have many rods
• large receptive fields

Question 13

temporal and nasal retina

Answer 13

right temporal= right 0-60

right nasal= right 0-90

Question 14

retinotopic map

Answer 14

each layer is this in thalamus

- wedge of degneration if thermonuclear explosion

Question 15

area 17

Answer 15

primary visual cortex

Question 16

blind vision

Answer 16

damage to area 17

- can still see but it is subconscious