Question

complete the table to compare the three types of passive transport. simple diffusion facilitated diffusion osmosis molecules cross the membrane through the phospholipids molecules cross the membrane through proteins molecules move down their concentration gradient molecules move without using cellular energy

Explanation:

Simple diffusion: molecules cross through phospholipids, move down concentration gradient, without using cellular energy. Facilitated diffusion: through proteins, down - gradient, no energy. Osmosis: water (a type of diffusion), can cross through proteins or phospholipids in some cases, down - gradient, no energy.

Answer:

	simple diffusion	facilitated diffusion	osmosis
molecules cross the membrane through proteins		√	√
molecules move down their concentration gradient	√	√	√
molecules move without using cellular energy	√	√	√