Question

Why is no

energy required
during diffusion?

A) Particles are moving DOWN the concentration
gradient

B) Particles are moving UP the concentration gradient

Answer 1

A

Step-by-step explanation:

Diffusion does not require energy because the substances move down the concentration gradient, from high to low concentration. In simple diffusion, molecules that are small and uncharged can freely diffuse across a cell membrane. They simply flow through the cell membrane. Simple diffusion does not require energy or need the assistance of a transport protein.