Chapter 9: The Eye

Question 1

How much of the human cortex is devoted to analyzing vision?

Answer 1

1/3

Question 2

Retina

Answer 2

-Part of CNS
-Photoreceptors
-Detects differrences in intensity of light

Question 3

Photoreceptors

Answer 3

Convert light energy into neural activity

Question 4

Lateral geniculate nucleus (LGN) in thalamus

Answer 4

-1st synaptic relay in primary visual pathway
-Visual information ascends to cortex wherre it’s interpreted and remembered

Question 5

Wavelength

Answer 5

Distance between successive peaks/troughs

Question 6

Frequency

Answer 6

Number of waves per second

Question 7

Amplitude

Answer 7

Difference b/t wave origin and trough/peak

Question 8

High energy

Answer 8

Gamma radiation and cool colors

Question 9

Low energy

Answer 9

Radio waves and hot colors

Question 10

Is energy proportional to frequency?

Answer 10

Yes

Question 11

Pupil

Answer 11

Opening where light enters the eye

Question 12

Iris

Answer 12

Gives color to eyes

Question 13

Sclera

Answer 13

White of the eye

Question 14

Cornea

Answer 14

Glassy transparent external surface of the eye

Question 15

Optic nerve

Answer 15

Bundle of axons from the retina

Question 16

Extraocular muscles

Answer 16

3 muscle pairs inserted into sclera

Question 17

Optic Disk

Answer 17

-Blood vessels enter eye and optic nerve exits the eye
-No photoreceptors
-Blind spot