In a voltage clamp experiment, you observe that the magnitude of the sodium current decreases when the membrane potential is stepped between +10 and +50 mV. Why?

Question

Quizplus · Accepted Answer

The driving force on sodium decreases as the membrane potential increases because the membrane potential approaches the equilibrium potential for sodium. The driving force is the difference between the membrane potential and the equilibrium potential, so as they become closer, the force driving sodium ions into the cell decreases, leading to a decrease in the magnitude of the sodium current.

In a Voltage Clamp Experiment, You Observe That the Magnitude