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Flashcards in 15.1 Deck (59)
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1

In the eye is parasympathic or sympathetic responsible for pupil size decreasing?

Parasympathetic

2

In the eye is parasympathic or sympathetic responsible for pupil size increasing?

Sympathetic

3

Which part of the eye contains the photosensitive neural layer of the eye?

The Retina

4

Rods or Cones
Dim light, peripheral vison receptors

rods

5

Rods or cones
vision receptors for bright light

cones

6

rods or cones
more numerous and more sensitive to light

rods

7

no color vision or sharp images

rods

8

high resolution color vision

cones

9

Numbers greatest at periphery

rods

10

Outer segment of photoreceptors are made of..

flattened plasma membrane

11

What is the term for the light sensitive molecule

chromophore

12

WHat is protein plus vitamin A dervived chromophore

Rhodopsin

13

Term for when a single photon (light particle) that causes entire protein to change shape

Isomerized

14

What is retinal originally derived from

B carotene

15

In retinal synthesis what happens after its isomertized by light

must be recycled by multi step enzymatic process that occurs partly in photoreceptor cells and partily in support (pigmented) cells

16

Which part of the eye contains mostly cones

macula

17

Which part of the eye contains all cones

Fovea centralis

18

Which part of the eye is responsible for the best vision

Fovea Centralis

19

Where is the cone density highest in

central vision

20

Which type of vision is rod density the greatest

peripheral vision

21

What is the cause of Glaucoma

pressure and pinching of the optic nerve

22

Which eye disease is caused by blocked drainage of aqueous humor increases pressure and causes compression of retina and optic nerve which eventually leads to blindness

Glaucoma

23

Clouding of the eye is referred to as

Cataracts

24

What eye disease is caused by crystalline proteins clump

Cataracts

25

Why do cataracts prevent eyesight

light cannot travel through the lens as well

26

Which is worse wet or dry AMD?

Wet

27

The fovea centralis is the center of what

macula

28

Rhodopsin is made from what

a G Protein Coupled Receptor

29

What are the four cells that vision works through

Photoreceptor to Bipolar to Retinal Ganglion to Brain

30

Do rods or cones have high sensitivity and function in dim light

rods