Sure! Here are the definitions for the specified types of passive transport:
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DIFFUSION: Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration, resulting in the net movement of substances down their concentration gradient. This process continues until equilibrium is reached, where the concentration of the molecules is equal throughout the space.
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FACILITATED DIFFUSION: Facilitated diffusion is a type of passive transport that involves the movement of substances across a cell membrane through specific transmembrane proteins. These proteins help facilitate the transport of molecules that are too large or polar to pass freely through the lipid bilayer, such as glucose and ions. Like diffusion, facilitated diffusion occurs along the concentration gradient and does not require energy.
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OSMOSIS: Osmosis is the specialized form of diffusion that specifically refers to the movement of water molecules through a selectively permeable membrane. Water moves from an area of lower solute concentration (where there is a higher concentration of water) to an area of higher solute concentration (where there is a lower concentration of water) until equilibrium is achieved.