A membrane channel whose opening depends on membrane potential. Regenerative activation and subsequent inactivation or opposing currents help produce an action potential.
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Voltage-gated ion channels are specialized membrane proteins that open or close in response to changes in the membrane potential (voltage) of a cell. They play a crucial role in the generation and propagation of electrical signals in excitable tissues, like neurons, muscle cells, and some endocrine cells. ### Key Features: 1. **Voltage Sensitivity**: These channels have sensors that detect changes in the electrical potential across the cell membrane.