Inside the cell membrane is a sodium potassium pump that needs ATP in order to pump sodium out of the cell and potassium inside.

细胞膜内的钠钾泵需要ATP供能，来把钠泵出细胞外，把钾泵入细胞内。

In most cells, the action potential starts with the resting potential, which the cell maintains by pumping sodium ions out and potassium ions in, Right?

在大多数细胞中，动作电位是从静息电位开始的，静息电位是细胞通过泵送钠离子和泵送钾离子来维持的，对吗？

Normally, electrocytes pump out sodium and potassium ions to maintain a positive charge outside and negative charge inside.

正常情况下，电细胞泵出钠离子和钾离子以维持外部正电荷和内部负电荷。

As a result, more sodium enters the principal cells and is available for the sodium-potassium pump, which pumps sodium out into the blood and pumps potassium into the cell, creating a relatively high potassium concentration in the principal cell.

因此，更多的钠进入主细胞，钠-钾泵得以将钠泵入血液，将钾泵入细胞，造成主细胞中相对高的钾浓度。