Question

larger molecules, ions, and polar molecules that move from high concentration to low concentration by crossing the cell membrane through transport proteins are undergoing: active transport facilitated diffusion simple diffusion osmosis rewatch

Explanation:

Facilitated diffusion is the movement of larger molecules, ions, and polar molecules from high to low concentration across the cell - membrane with the help of transport proteins. Active transport moves substances against the concentration gradient. Simple diffusion is for small, non - polar molecules without the need for transport proteins. Osmosis is the diffusion of water across a semi - permeable membrane.

Answer:

B. facilitated diffusion