Ca²⁺-Pumps in the Plasma Membrane and Endoplasmic Reticulum Are Important

question 56

Multiple Choice

Ca²⁺-pumps in the plasma membrane and endoplasmic reticulum are important for

• A)maintaining osmotic balance.
• B)preventing Ca²⁺ from altering the activity of molecules in the cytosol.
• C)providing enzymes in the endoplasmic reticulum with Ca²⁺ ions that are necessary for their catalytic activity.
• D)maintaining a negative membrane potential.

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