Final answer:
The statement is false, as plasma proteins are too large to cross the capillary cell membrane by facilitated diffusion. The cell membrane's selective permeability allows only certain molecules to pass, often requiring transport proteins for larger ones.
Step-by-step explanation:
The statement is false. Plasma proteins generally do not cross the capillary cell membrane through facilitated diffusion because they are large molecules. Instead, the cell membrane is selectively permeable and allows only certain substances to pass through. Smaller molecules and ions may move via passive transport mechanisms such as diffusion, osmosis, and facilitated diffusion. In the case of plasma proteins, these large molecules cannot freely pass through the pores of the capillary walls due to their size.
The plasma membrane's selective permeability means that it lets only certain substances pass through while blocking others. Factors such as size, charge, and polarity influence whether a substance can cross the membrane. Large polar molecules like plasma proteins typically require specialized transport mechanisms and cannot diffuse unassisted across the membrane.
Substances that are impermeable, like electrically charged ions or large polar molecules such as plasma proteins, often rely on transport proteins to move across the membrane, which could involve carrier proteins and can sometimes require energy (active transport), unlike facilitated diffusion that does not require energy.