Name Short answers (1) Answer the following questions about the relative refract

Question

Name Short answers (1) Answer the following questions about the relative refractory period (RRP). (a) During the RRP, AP threshold transiently becomes more depolarized than it is normally. What change(s) occur as a function of time during the RRP that cause(s) AP threshold to gradually return to its normal value? (b) Suppose that, during the RRP after an AP, you use a brief depolarization to initiate a second AP. Should the peak (most positive) Vm reached during the second AP be more positive less positive, or the same as the peak Vm during the first AP? If you expect a change in peak Vm, explain the cause(s) of the change

Explanation / Answer

Part a-

The changes occurs as the function of time-

dw/dt = dv/dt

Here w is the relative refractive period over time t and dv is the voltage applied over time t.

Part b-

There would unchanged peak occurred for Vm if the Action potential is the same as previous. However, in the case of brief depolarization, Vm peak may or may not reach to action potential and the peak of Vm may be lower than previous one.

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