movement of molecules from an area of high concentration to an area where they are less concentrated. until equilibrium is reached.

Question

Group of answer choices

facilitated diffusion

osmosis

active transport

simple diffusion

Answer 1

The correct answer is simple diffusion.

Simple diffusion refers to the movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached, without the need for energy or assistance from transport proteins.

In contrast:

• Facilitated diffusion also involves movement from high to low concentration but requires specific transport proteins to help move the molecules.
• Osmosis specifically refers to the diffusion of water across a selectively permeable membrane.
• Active transport involves the movement of molecules against their concentration gradient (from low to high concentration), requiring energy.