Final answer:
Biological membranes are selectively permeable, controlling the movement of substances to maintain cellular homeostasis. They are not completely impermeable, as they allow specific molecules to pass based on the needs of the cell.
Step-by-step explanation:
The question pertains to the nature of biological membranes that compartmentalize the cell. To clarify, these membranes are not impermeable; rather, they display selective permeability. This means that the membrane controls the entry and exit of materials, allowing certain substances to pass while blocking others. This selective permeability is crucial for maintaining cellular homeostasis and facilitates the dynamic processes required for cell growth and function. Consequently, different regions of the plasma membrane exhibit varying degrees of fluidity and selective permeability, which are essential for the proper functioning of the cell.
The biological membranes that partition the cell into functionally distinct compartments are not impermeable. In fact, they are selectively permeable or semipermeable. This means that they allow some materials to freely enter or leave the cell, while other materials require specialized structures and sometimes energy investment to cross.