Rods exposed to light will hyperpolarize due to the closing of sodium channels.
Exposure of the retina to light hyperpolarizes the rods and cones, releasing the inhibition of their bipolar cells. The now-active bipolar cells in turn stimulate the ganglion cells, which send action potentials along their axons (which leave the eye as the optic nerve).
The decrease in cation flow into the cell generates the photoreceptor to hyperpolarize. Light getting the photoreceptor induces a conformational difference in the opsin protein, which activates the G-protein transducing. Transducing activates phosphodiesterase (PDE), which transforms cGMP to GMP.
Therefore, the correct answer is option B. Hyperpolarizes due to the closing of sodium channels.
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