Psychology Question:
A voltage-gated ion channel in a ventricular myocyte:

Answer:
* a) Usually has a single gate that opens and closes.
* b) Sometimes, have two gates that open and close together.
* c) Is always closed when the cell is resting
* d) Selects the type of ion that passes across the membrane
* e) Usually close when the membrane potential depolarizes.
Answer - d
* b) Sometimes, have two gates that open and close together.
* c) Is always closed when the cell is resting
* d) Selects the type of ion that passes across the membrane
* e) Usually close when the membrane potential depolarizes.
Answer - d
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