Facilitated diffusion aids in moving molecules across the membrane without energy expenditure. Osmosis involves water movement based on concentration differences. Passive transport includes various methods of substance movement without using cellular energy.
Facilitated diffusion is the process where molecules move across the plasma membrane with the assistance of proteins down a concentration gradient without the use of cellular energy. It allows molecules like glucose or ions to pass through the membrane using specific integral proteins as channels or carriers.
Osmosis is the movement of water across a semipermeable membrane from an area of high water concentration to an area of low water concentration. This occurs when there is an imbalance of solutes between the cell and its surroundings, resulting in hypertonic or hypotonic solutions.
Passive transport includes diffusion, osmosis, and facilitated diffusion, where substances move down their concentration gradient without requiring the cell to expend energy. Facilitated diffusion specifically involves the assistance of proteins for molecule transport.
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