The Structure That Separates the Fluid Outside the Cell from the Fluid

Question

The structure that separates the fluid outside the cell from the fluid inside the cell is the
A) cell membrane
B) nuclear membrane
C) membranous organelle
D) mitochondrial membrane
E) layer of glycoprotein

Accepted Answer

The cell membrane, also known as the plasma membrane, is a selectively permeable barrier that separates the fluid outside the cell from the fluid inside the cell. It controls what substances can enter and exit the cell, and helps maintain the cell's internal environment. The other options (B-D) are all membranes found within the cell, but do not serve as the primary structure that separates the internal and external fluid environments. E is not a structure found in cells.