Blind spot 

There are no visual receptors over the optic disk.

 

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Heteronymous (opposite sides of the visual fields) Hemianopia 

A lesions in the optic chiasm

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The responses of the rods, cones, and horizontal cells are hyperpolarizing potential

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The responses of amacrine cells produce depolarizing potential

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The labyrinth has three components: 

Cochlea (containing receptors for hearing)

Semicircular canals (containing receptors that respond to head rotation)

Otolith organs (containing receptors that respond to gravity and head tilt)

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The bony labyrinth is a series of channels and filled with a fluid called perilymph, which has a relatively low concentration of K+, similar to that of plasma or the cerebral spinal fluid