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Visual acuity is:

highest in the region where axons of retinal ganglion cells form the optic nerve leaving the eye.

lowest in the retinal regions where receptive fields of retinal ganglion cells are smallest.

highest in retinal regions where only rods are present.

highest, in both daylight and at night, in the region where cones are maximally concentrated.

highest in retinal regions where functioning retinal ganglion cells have the smallest receptive fields.

Which of the following statements about the receptive field (RCF) of a retinal ganglion (RGC) is CORRECT?

The RF is the change in resting membrane potential of the RGC produced by light.

The RF is the cell which is responsible for the direct pathway from rods to RGCs.

The RF is made up of centre and surround regions which produce opposite effects on activity in the RGC.

✅

The RF is made up of horizontal and amacrine regions which produce opposite effects on RGC activity.

The RF represents the area of the retina which excites the RGC.

Light adaptation is a process

Found in rods and cones

✅

Found only in rods

Found only in the fovea

Found in the fovea and para-fovea but not retinal periphery

Found in inner and outer segments of the retina

In the figure of the structure of the ear, the Auditory Nerve is indicated by the letter

Pupils decrease in size when looking at a closer object

During the near response

Pupils increase in size when looking at a closer object

Pupils stay the same size whether looking at far or near objects

None

Pupils change size in response to a change in light levels

Adaptation rate is affected by

All of the above

Inherent properties of the membrane

Accessory structures

None of these, as adaption rate is the same for all types of mechanoreceptors

Depth of the receptor

In the figure of the structure of the eye, the blind spot is indicated by the letter

One error in testing for complex tactile shapes is that the experimenter may not have drawn the different shapes to the same size.

In the figure of the structure of the eye, the fovea is indicated by the letter