Question

1. define passive transport: 5. what are the 3 types of passive transport? a. b. c. 6. define diffusion:

Explanation:

1. Passive transport is the movement of substances across a cell membrane without the use of energy (ATP). It occurs from an area of higher concentration to an area of lower concentration, following the concentration gradient.
2. The three types of passive transport are simple diffusion, where small non - polar molecules move directly through the lipid bilayer; facilitated diffusion, which uses transport proteins (channels or carriers) to move polar or large molecules across the membrane; and osmosis, the diffusion of water across a semi - permeable membrane.
3. Diffusion is the movement of molecules or ions from an area of higher concentration to an area of lower concentration until equilibrium is reached. It is a passive process and is driven by the random motion of particles.

Answer:

1. The movement of substances across a cell membrane without energy input, following the concentration gradient.
2. a. Simple diffusion

b. Facilitated diffusion
c. Osmosis

1. The movement of molecules or ions from high to low concentration until equilibrium.