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What is active transport?
The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.
Give some examples of active transport.
Examples include the sodium-potassium pump, endocytosis, and exocytosis.
What is passive transport?
The movement of molecules across a cell membrane from a region of higher concentration to a region of lower concentration, without requiring energy.
Give some examples of passive transport.
Examples include diffusion, osmosis, and facilitated diffusion.