Which of the following statements concerning the absolute refractory period is inaccurate?
a. the absolute refractory period refers to the period of time during which another action potential cannot be initiated
b. the absolute refractory period corresponds to the time period during which the Na+ gates are first opened and then closed and inactivated.
c. the relative refractory period immediately follows the absolute refractory period
d. the absolute refractory period occurs during the after hyperpolarization phase of the action potential.
e. the absolute and relative refractory periods assure the unidirectional spread of the action potential down the nerve fiber away from the initial site of activation.
D
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