Diffusion: Smelling perfume from across the room, tea going from tea bag to water, Mr. Masarik farting and you smelling it, the movement of ANY molecule from HIGH to LOW concentration, molecules spreading from high to low concentration, Osmosis: the movement of WATER from HIGH to LOW concentration, movement of water into and out of a cell, How your cells get and release water, how plant cells get and release water, the reason our red blood cells would burst if they were exposed to pure water, Passive Transport: how molecules move ACROSS A CELL MEMBRANE from HIGH to LOW concentration, how oxygen and carbon dioxide move across your cell membrane, does NOT require energy to move molecules across the cell membrane, does NOT require ATP (cell energy), Active Transport: molecules move from LOW to HIGH concentration USING energy, endocytosis is an example of this, exocytosis is an example of this, a protein channel using energy to pump minerals into a cell, what plant cells use to keep a high concentration of minerals inside their cells (otherwise they would lose it due to passive transport), ,

Cell Transport

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