Question

1. describe the three types of passive transport. 1. diffusion 2. osmosis 3. facilitated diffusion

Explanation:

Diffusion is the movement of substances from an area of high - concentration to low - concentration. Osmosis is the diffusion of water across a semi - permeable membrane. Facilitated diffusion uses transport proteins to move substances across the membrane down their concentration gradient, all without the use of energy, which are characteristics of passive transport.

Answer:

1. Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.
2. Osmosis is the diffusion of water across a selectively permeable membrane.
3. Facilitated diffusion is the movement of substances across a membrane with the help of transport proteins, down their concentration gradient.