retina

Question 1

describe what happens to an on centre bipolar cell to an increase in glutamate

Answer 1

close Na, open K cause hyperpol

the response to light is on centre bipolar depolarisation (sign-inverting)

Question 2

describe what happens in an off centre bipolar cell in response to increase in glutamate

Answer 2

open Na -> close K+ leads to depolarisation in the dark

response to light is off centre bipolar hyperpol (sign-conserving)