In the absence of light,there is movement of Na⁺ in the photoreceptors causing a depolarization.This is called the

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Quizplus · Accepted Answer

The movement of Na⁺ in photoreceptors in the absence of light causes a depolarization, which is known as the dark current. This is because in the dark, ion channels in photoreceptor cells remain open, allowing for a steady influx of positively charged ions, like sodium, which depolarizes the cell. The other options are not related to this particular phenomenon.

In the Absence of Light,there Is Movement of Na+ in the Photoreceptors

In the Absence of Light,there Is Movement of Na⁺ in the Photoreceptors