Lecture 7 on/off bipolar worksheets

Question 1

When light hits a photoreceptor, it _______ and ______ glutamate

a) hyperpolarizes, inhibits
b) hyperpolarizes, releases
c) depolarizes, inhibits
d) depolarizes, releases

Answer 1

a) hyperpolarizes, inhibits

Question 2

in the dark, a photoreceptor, _______ and ______ glutamate

a) hyperpolarizes, inhibits
b) hyperpolarizes, releases
c) depolarizes, inhibits
d) depolarizes, releases

Answer 2

d) depolarizes, releases

Question 3

which 2 retinal cells have action potentials?

Answer 3

amacrine and ganglion

Question 4

in the light, an on bipolarcell:

a) hyperpolarizes, inhibits glutamate
b) hyperpolarizes, releases glutamate
c) depolarizes, inhibits glutamate
d) depolarizes, releases glutamate

Answer 4

d) depolarizes, releases glutamate

Question 5

in the light, an off bipolar cell:

a) hyperpolarizes, inhibits glutamate
b) hyperpolarizes, releases glutamate
c) depolarizes, inhibits glutamate
d) depolarizes, releases glutamate

Answer 5

a) hyperpolarizes, inhibits glutamate

Question 6

in the dark, an on bipolar cell:

a) hyperpolarizes, inhibits glutamate
b) hyperpolarizes, releases glutamate
c) depolarizes, inhibits glutamate
d) depolarizes, releases glutamate

Answer 6

a) hyperpolarizes, inhibits glutamate

Question 7

in the dark, an off bipolar cell:

a) hyperpolarizes, inhibits glutamate
b) hyperpolarizes, releases glutamate
c) depolarizes, inhibits glutamate
d) depolarizes, releases glutamate

Answer 7

d) depolarizes, releases glutamate

Question 8

true or false: a hyperpolarization event can lead to either inhibition or release of glutamate?

Answer 8

false, hyperpolarization always leads to the inhibition of glutamate

Question 9

true or false: a depolarization event can lead to either inhibition or release of glutamate?

Answer 9

false, depolarization always leads to the release of glutamate