The movement of molecules across a membrane from an area of higher concentration to an area of lower concentration with the use of a carrier molecule embedded in the membrane is called

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Facilitated diffusion involves the use of a carrier molecule to help move molecules across a membrane. This process does not require energy and moves molecules in the direction of their concentration gradient (from high to low concentration). Osmosis is the movement of water molecules across a membrane from an area of high water concentration to an area of low water concentration. Passive diffusion refers to the movement of molecules across a membrane from high concentration to low concentration without the use of a carrier molecule. Active transport moves molecules across a membrane against their concentration gradient using energy.

The Movement of Molecules Across a Membrane from an Area