The time interval between action potentials is called the

 The time interval between action potentials is called the _______.

   potential frequency
   threshold frequency
   threshold interval
   interspike interval

Part B
Increase in stimulus intensity _______.

   increases the frequency of action potentials
   has no effect on action potentials
   increases the duration of the action potential
   increases the size of the action potential

Part C
The frequency of action potentials is _______.

   the reciprocal of the interspike interval, and measured in hertz
   the reciprocal of the interspike interval
   measured in hertz
   the same as the relative refractory period
   measured in hertz, and the same as the relative refractory period

Part D
During the relative refractory period, _______.

   the stimulus must be below threshold to generate an action potential
   adaptation occurs
   no action potentials are generated
   the stimulus must be above threshold to generate an action potential