When the bipolar cell depolarizes, it releases more glutamate onto the terminal of the amacrine cell. ... These ganglion cells are thus phasically active, firing a burst of action potentials immediately after the onset of a stimulus but fewer as the stimulus continues.

Do bipolar cells generate action potentials?

Bipolar cells of the magnocellular pathway in the primate retina can generate action potentials because they have an axonal segment with high sodium channel density, comparable to the sodium channel band in retinal ganglion cells or pyramidal cells.

Do bipolar cells have action potentials or graded potentials?

A wide spectrum of light enters the eye and reaches the photoreceptors. These photoreceptors generate graded potentials, and bipolar cells transduce these graded potentials to the proper stimulation signals for triggering ganglion cells.