lecture 2: functional retinal physiology

Retinal ganglion cells project to the:

all of the above

Action potentials are produced by:

ganglion cells

Which of the following would elicit the largest excitatory response in an off-center ganglion cell?

spot of darkness covering only the cell's receptive field's center

melanopsin has been found in:

horizontal cells

The visually inert portion of rhodopsin is the:

opsin

Immediately prior to exposure to a light, the resting potential of a rod is closest to:

-50mV

With regard to a conventional flat synapse made by a bipolar cell, which of the following is true?

the neurotransmitter is glutamate

Extracellular recording techniques may be used to record the activity of which cells?

ganglion

A quantum of light is absorbed by rhodopsin. The event immediately preceding the closing of Na+ pores in the rod outer segment is:

cGMP --> GMP

With regard to horizontal cells, which is false?

show spatial antagonism

Which is not a characteristic of on-center bipolar cells?

glutamate causes depolarization

Which of the following would elicit the smallest excitatory response in an on-center parasol ganglion cell?

spot of light covering the cell's entire receptive field

With regard to the invaginating synapse formed by photoreceptors, horizontal cells, and bipolar cells, which is false?

the associated bipolar is off-center

The receptive field center of a foveal midget bipolar cell is formed by how many photoreceptors?

one

which bipolar cells manifest color opponency?

midget