Chapter17 part 5p. 587-light/dark,color

Question 0

What is the dark-adapted state?

Answer 0

when the visual pigments are fully receptive to stimulation

Question 1

After 30 minutes or more in the dark, almost all visual pigments will have recovered from

Answer 1

photobleaching

Question 2

As the light comes on from dark, over the next few minutes your sensitivity decreases as ________ occurs

Answer 2

bleaching

Question 3

After the light comes on, eventually, the rate of bleaching is balanced by the rate at which the visual pigments ________

Answer 3

reassemble

Question 4

What is the light-adapted state?

Answer 4

when rate of bleaching is balanced by rate of visual pigment reassembly

Question 5

What is the reflex controlling the pupil?

Answer 5

pupillary constrictor reflex

Question 6

What is a disease characterized by progressive retinal degeneration?

Answer 6

retinitis pigmentosa

Question 7

retinitis pigmentosa eventually leads to _______

Answer 7

blindness

Question 8

What part of photoreceptors are affected by the mutation from retinitis pigmentosa?

Answer 8

visual pigments of the membrane discs

Question 9

Color discrimination takes place through integration of information arriving from ___________

Answer 9

all 3 types of cones

Question 10

If all 3 cone populations are stimulated, we perceive the color as

Answer 10

white

Question 11

If rods, but not cones, are stimulated, we perceive the color

Answer 11

white

Question 12

Name 2 Possible cause for color blindness

Answer 12

1. cones are absent

2. cone can’t manufacture necessary visual pigment

Question 13

What is the most common type of color blindness?

Answer 13

red-green

Question 14

which cones are missing in red-green color blindness

Answer 14

red

Question 15

10% of _____ show some color blindness

Answer 15

males