| 1. | Rod cells detect shape and motion, and function in dim light.
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| 2. | A human rod cell is about 2 microns in diameter and 100 microns long.
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| 3. | Red, on the other hand, stimulates only the red receptors and the rod cells.
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| 4. | :: The cone cells detect color but the rod cells only detect overall brightness.
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| 5. | When rod cells are in the dark, they are depolarized.
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| 6. | The human retina contains about 120 million rod cells and 6 million cone cells.
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| 7. | The retina contains two types of photosensitive cells, the rod cells and the cones.
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| 8. | Though cone cells primarily use the neurotransmitter substance acetylcholine, rod cells use a variety.
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| 9. | Like cones, rod cells have a synaptic terminal, an inner segment, and an outer segment.
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| 10. | The AII amacrine cell is a mediator of signals from rod cells under scotopic conditions.
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