8. For which of the following reasons was the development of the voltage clamp critical to investigations of the ionic basis of the action potential?
9. Which of the following is notan observation that helped to identify sodium as the early current of the action potential?
10. Voltage clamp data, in which investigators analyzed membrane conductance during action potentials, showed all of the following excepta. the sodium current was rapidly activated by depolarization. b. the potassium current activates on a comparatively slow time scale of a few ms. c. at certain potentials, there can be zero current even with a large conductance. d. depolarization leads to a time-dependent inactivation of the sodium current. e. depolarization leads to a time-dependent inactivation of the potassium current.