Select the correct statement.

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(A) In the human eye,photoreceptor cells (rods and cones) are in a state of depolarization in the dark,releasing neurotransmitters like glutamate. Whe

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Photoreceptor cells in the human eye are depolarized in the dark and become hyperpolarized under the influence of light.

Vedclass · Answer

(A) In the human eye,photoreceptor cells (rods and cones) are in a state of depolarization in the dark,releasing neurotransmitters like glutamate. When light strikes these cells,it triggers a biochemical cascade that leads to hyperpolarization of the cell membrane,thereby reducing the release of neurotransmitters. Thus,statement $A$ is correct. Statement $B$ is incorrect because receptor cells do generate graded potentials. Statement $C$ is incorrect because nociceptors are pain receptors,not pressure receptors. Statement $D$ is incorrect because Meissner's corpuscles are mechanoreceptors that detect light touch,not thermoreceptors.

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