In the dark,the Na⁺ channels in the outer segments of rod cells are A)open. B)closed. C)primarily affected by inhibitory neurotransmitter input. D)important in making the cell hyperpolarized in this resting state.

Question

Quizplus · Accepted Answer

In the dark, the Na+/Ca2+ channels (often referred to as cyclic nucleotide-gated channels) in the outer segments of rod cells are open, allowing a constant influx of Na+ and Ca2+ ions. This keeps the cell in a depolarized state, which is its resting state in the absence of light.

In the Dark,the Na+ Channels in the Outer Segments of Rod

In the Dark,the Na⁺ Channels in the Outer Segments of Rod