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| Q. |
Regarding rods and cones: |
| A. | Na+ channels are closed in the dark |
| B. | light striking the outer segments results in a depolarising receptor potential |
| C. | the receptor potentials are all-or-nothing |
| D. | rhodopsin is a serpentine receptor |
| E. | acetylcholine is released from the synaptic terminal |
| Answer» C. the receptor potentials are all-or-nothing | |
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