Which statement about the plasma membrane is not true?
A)It serves as a mechanical barrier to hold in the contents of the cell.
B)It selectively controls movement of molecules between the ECF and the cytoplasm.
C)It is the barrier that surrounds the blood vessels and separates the blood plasma from the interstitial fluid.
D)It contains proteins that provides for various membrane functions.
E)It consists mostly of lipids and proteins.

Question

Quizplus · Accepted Answer

The statement that the plasma membrane is the barrier that surrounds the blood vessels and separates the blood plasma from the interstitial fluid is incorrect. The statement is actually describing the function of the endothelial cells lining the blood vessels, not the plasma membrane of cells. The plasma membrane surrounds individual cells and regulates the movement of molecules between the cell and its external environment.

Which Statement About the Plasma Membrane Is Not True