The "Dark Current" of Photoreceptors Refers to

question 102

Multiple Choice

The "dark current" of photoreceptors refers to

• A) the exit of Na⁺ and Ca²⁺ out of the cell when light is not hitting the cell.
• B) the entry of Na⁺ and Ca²⁺ into the cell when light is not hitting the cell.
• C) the entry of K⁺ into the cell when light is not hitting the cell.
• D) the exit of K⁺ out of the cell when light is not hitting the cell.

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