What Is the Direction of Sodium Ion Flow Through Sodium

question 138

Multiple Choice

What is the direction of sodium ion flow through sodium channels in a photoreceptor cell in the dark?

• A)from the cytoplasm into the extracellular space
• B)from the smooth endoplasmic reticulum into the cytosol
• C)from the extracellular space into the cytoplasm
• D)from vesicles into the synapse

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