Physioex 9.0 Exercise 3 Pre & Post-Lab Activity 6

Pre-Lab

When the stimulus intensity increases, _______.
When the stimulus intensity increases, _______.
    the size of the action potential decreases
    the number of action potentials increases
    the size of the action potential increases
    the number of action potentials decreases

In this activity, which of the following will increase the stimulus intensity?
In this activity, which of the following will increase the stimulus intensity?
    increasing the duration of the stimulus
    increasing the relative refractory period
    decreasing the absolute refractory period
    increasing the absolute refractory period

At threshold, axons will _______.
At threshold, axons will _______.
    Usually be at the end of their absolute refractory period.
    Always generate an action potential.
    Begin to hyperpolarize the membrane potential.
    Likely generate an action potential if refractory periods have elapsed.

Longer stimuli will allow for _______.
Longer stimuli will allow for _______.
    more action potentials to occur
    the relative refractory period to finish
    more action potentials to occur, the absolute refractory period to finish and the relative refractory period to finish
    the absolute refractory period to finish

Post-Lab

The time interval between action potentials is called the _______.
The time interval between action potentials is called the _______.
    threshold frequency
    threshold interval
    interspike interval
    potential frequency

Increase in stimulus intensity _______.
Increase in stimulus intensity _______.
    increases the frequency of action potentials
    increases the size of the action potential
    has no effect on action potentials
    increases the duration of the action potential

The frequency of action potentials is _______.
The frequency of action potentials is _______.
    measured in hertz
    the reciprocal of the interspike interval, and measured in hertz
    the reciprocal of the interspike interval
    the same as the relative refractory period
    measured in hertz, and the same as the relative refractory period

During the relative refractory period, _______.
During the relative refractory period, _______.
    no action potentials are generated
    the stimulus must be below threshold to generate an action potential
    adaptation occurs
    the stimulus must be above threshold to generate an action potential