Question

carbon dioxide molecules cross the cell membrane by simple diffusion, while potassium ions cross by facilitated diffusion. complete the table to compare simple diffusion and facilitated diffusion. simple diffusion facilitated diffusion molecules move from areas of high concentration to areas of low concentration molecules pass directly through the phospholipids in the cell membrane molecules pass through proteins in the cell membrane large or charged molecules can move across the cell membrane molecules move across the cell membrane without needing cellular energy

Explanation:

Simple diffusion: molecules move down - concentration gradient, pass through phospholipids, small non - charged molecules, no energy. Facilitated diffusion: same gradient, through proteins, for large/charged molecules, no energy.

Answer:

	simple diffusion	facilitated diffusion
molecules pass directly through the phospholipids in the cell membrane	Yes	No
molecules pass through proteins in the cell membrane	No	Yes
large or charged molecules can move across the cell membrane	No	Yes
molecules move across the cell membrane without needing cellular energy	Yes	Yes