Cells may frequently find themselves in an environment with very low extracellular concentrations of substances needed in higher amounts inside the cell.To obtain these needed items,such cells would be most likely to engage in
A)simple diffusion.
B)facilitated diffusion.
C)active transport.
D)osmosis.

Question

Quizplus · Accepted Answer

Active transport would be the most efficient way for cells to obtain substances needed in higher amounts inside the cell from an environment with very low extracellular concentrations. This is because active transport can move molecules against their concentration gradient, from low concentration to high concentration, which is the opposite of diffusion or osmosis. Facilitated diffusion could also be used, but it would require the presence of a transporter protein in the cell membrane to facilitate the movement of the substance across the membrane, and this may not always be available. Simple diffusion and osmosis would not be effective for obtaining substances in low concentrations.

Cells May Frequently Find Themselves in an Environment with Very