Why does the threshold increase when the interval between the stimuli decreases?

A) Potassium is flowing into the cell.
B) Some sodium channels have been inactivated and cannot be reopened immediately.
C) Calcium is flowing out the cell.
D) Sodium is flowing out of the cell.


Ans: B) Some sodium channels have been inactivated and cannot be reopened immediately.

Anatomy & Physiology

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