Which of the Following Situations Occurs in Electrically Excitable Cells

question 22

Multiple Choice

Which of the following situations occurs in electrically excitable cells?

• A)When Na+ ion channels open,K+ ion channels close.
• B)The sodium-potassium exchange pump moves sodium into the cell.
• C)Depolarization causes voltage-gated sodium ion channels to open.
• D)Ligand-gated sodium ion channels are opened by high extracellular calcium levels.
• E)Proteins tend to diffuse out of the cell.

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