potassium-sodium exchange

例句：

1. 1.Potassium-sodium exchange is a crucial process in the human body.
   钾钠交换是人体中一个至关重要的过程。
2. 2.The kidneys are responsible for potassium-sodium exchange.
   肾脏负责钾钠交换。
3. 3. During potassium-sodium exchange, the sodium ions move from the blood to the cells.
   在钾钠交换过程中，钠离子从血液中移动到细胞中。