Certain Tumor Cells Are Known to Have a Plasma Membrane

question 29

Multiple Choice

Certain tumor cells are known to have a plasma membrane Na⁺ channel that is activated by acidic extracellular pH. In these cells, if acid is added to the extracellular medium, the:

• A) Membrane potential will hyperpolarize.
• B) Rate of ATP utilization will increase.
• C) Cells will shrink.
• D) Na⁺ K⁺-ATPase will become inactivated.
• E) K⁺ efflux will decrease.