Action potentials started by light hitting the rods would likely: Be caused by light somehow allowing enough sodium ions to leak into the cell to cause threshold potential Not be conducted to the visual cortex of the brain if a drug like Lidocaine was present within the optic nerve at a region where there are Nodes of Ranvier Involve the opening of at least one voltage-gated sodium channel Would only occur at specific wavelengths of light, depending on which type of rod was present at that location in the retina 2
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