The response of a bipolar cell,that is whether it acts to bring about an "ON pathway" or an "OFF pathway," depends on the amount of glutamate released by photoreceptor cells.

Question

Quizplus · Accepted Answer

The response of a bipolar cell (ON or OFF pathway) depends on the type of glutamate receptors it possesses, not on the amount of glutamate released by photoreceptor cells. ON bipolar cells have metabotropic glutamate receptors that respond to a decrease in glutamate release (light), while OFF bipolar cells have ionotropic glutamate receptors that respond to an increase in glutamate release (darkness).

The Response of a Bipolar Cell,that Is Whether It Acts