07 Retina Flashcards Preview

Vision Science I > 07 Retina > Flashcards

Flashcards in 07 Retina Deck (29):
1

Slide 17

Name the different types of bipolar cells (majority)

-diffuse
-midget
-S cone
-rod

2

Slide 17/22

True or false. There are two types of midget bipolar cells responding to a single cone either the on cell or off cell. They are located mostly in the fovea.

True

3

Slide 18

.____ bipolar cells might get input from 30-50 ____. This is why night vision is blurry.

A. Rod/rods
B. Midget/rods
C. S cone/rods
D. Rod/ midget

A. Rod/Rods

4

Slide 20

True or False. Midget bipolar cells are intermediate cells that modulate ganglion cells.

False: Amacrine bipolar cells

5

Slide 20

What is the most common amacrine cell?

Starburst Amacrine cell

6

Slide 21

Blue-yellow ganglion cells distinguish different _____

A. shapes
B. wavelengths
C. Visual details

B. wavelengths

7

Slide 21

____ ganglion cells get input from L and M cones in order to distinguish shape and luminance
A. Parasol
B. Midget
C. Blue-Yellow
D. Biplexiform

A. Parasol

8

Slide 7

True or false. More glutamate is released in the dark

true

9

Slide 7

True or false. The disks in rods regenerate and are replaced by outer segment cells.

False, they are replace by inner segment cells

10

Slide 8

True or false. The fovea centralis has the highest number of cones.

True

11

Slide 9

4. There are _______ as many rods as cones.
a. 5-10 times
b. 15-20 times
c. 30-40 times
d. 50-60 times

b. 15-20 times

12

Slide 7

5. The __________________ catches the photons.
a. Synaptic terminal
b. Outer segment
c. Inner segment
d. Bipolar cells

b. Outer segment

13

Slide 10

6. True or false. Primates have two cone types but mammals have three.

False: primates have three cone types but most mammals have only two

14

Sldie 11

True or false. There are mechanisms to neutralize signals of L/M cone ratios

True

15

Slide 12

What do cone pedicles couple responses through?

Gap junctions

16

Slide 13

True or false. Horizontal cells are mostly inhibitory.

True

17

Slide 13

Horizontal Cells sample activation from _____________

A broad area

18

Slide 14

What are the two types of horizontal cells?

HI and HII

19

Slide 14

HI cells connect to _____________

Rods, L and M cones

20

Slide 15

True or false. HI cells have short arbors.

False, HI cells have long arbors

21

Slide 16

What do HII cells connect to?

S, L and M cones

22

slide 2

Light penetrates through which section of the retina first?
a) Ganglion cell layer
b) Inner synaptic layer
c) Inner limiting membrane
d) Inner nuclear layer

c) Inner limiting membrane

23

Slide 2

Photoreceptors are found in which part of the retina?

Outer segment

24

Slide 2

The retina has __________________ sections. Those sections are made of __________________cell layers and __________________ intermediate layers.

a) 5, 2, 3 intermediate layers
b) 5, 3, 2 intermediate layers
c) 5, 3, 3 intermediate layers
d) 5, 4, 3 intermediate layers

a) 5, 2, 3 intermediate layers

25

Slide 3

True or false: Rods and cones in outer plexiform layer synapse with horizontal cells.

True

26

Slide 4

True or false: photoreceptors respond to light by graded potential and not action potentials

True

27

Slide 5

What are the 4 most common ganglion cells in the eye?
a) Large bodied cells, midget cells, stratified cells, parasol cells
b) Midget cells, horizontal cells, parasol cells, amacrine cells
c) parasol cells, bipolar cells, small bodied inner cells, amacrine cells
d) Parasol cells, midget cells, bistratified cell, small bodied inner cells

d) Parasol cells, midget cells, bistratified cell, small bodied inner cells

28

Slide 5

Which type of ganglion cell codes for color?
a) Parasol cells
b) Midget cells
c) bistratified cell
d) Small bodied inner cells

b) Midget cells

29

Slide 6

True or false: We have approximately 20 times more cones than rods

False