The movement of molecules from a region of high concentration to a region of low concentration is

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Quizplus · Accepted Answer

The movement of molecules from a region of high concentration to a region of low concentration is called diffusion. This occurs in both gases and liquids, and is a fundamental process in biology as it allows for the movement of molecules across membranes and the exchange of nutrients and waste products between cells and their environment. Osmosis is a specific type of diffusion where water molecules move across a semi-permeable membrane from an area of high water concentration to an area of low water concentration. Movement against the concentration gradient (choice B) is not possible without the input of energy, and Brownian motion (choice C) refers to the random movement of particles in a fluid due to collisions with other particles. Choice E is incorrect as diffusion can occur in both gases and liquids.

The Movement of Molecules from a Region of High Concentration