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Sodium is kept outside of cells and potassium inside them This fact will become important when we study muscle and nerve cells. Which of these things would you NOT expect to find on a muscle or nerve cell? Answers: An ATP powered pump that moves sodium against its concentration gradient/ An always open channel that lets sodium move down Ils concentration gradient /Agated channel that allows sodium in only at certain times​

Sagot :

B. An always open channel
Explanation: this would allow sodium inside the cell at all times, which would be bad!