Question

Drag the terms on the left to complete the sentences on the right.
ResetHelp
When molecules move down their concentration gradient, they move from where they are Blank to where they are Blank.target 1 of 3target 2 of 3
Diffusion across a biological membrane is called Blank.

Answer 1

When molecules move down their concentration gradient, they move from where they are **more concentrated** to where they are **less concentrated**.

Diffusion across a biological membrane is called **facilitated diffusion** (if it involves specific transport proteins) or simply **diffusion** (if it occurs freely across the membrane).