Photoreceptors in the retina secrete a large amount of neurotransmitter in a. The presence of light (light phase) b. The...

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Medical Sciences

Photoreceptors in the retina secrete a large amount ofneurotransmitter in

a.

The presence of light (light phase)

b.

The absence of light (dark phase)

c.

Regardless of the light

d.

Photoreceptors do not secrete neurotransmitter

Answer & Explanation Solved by verified expert
4.2 Ratings (539 Votes)
Option b is correct Justification The photoreceptors of retina gets depolarized in the dark phase So they secrete a high amount of neurotransmitter called glutamate in the absence of light    See Answer
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