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BISC 440 Lab 9: Cell Membrane and Transport questions and answers (graded A+)
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Active transport Energy-requiring movement of molecules across a membrane from a region of lower concentration to a region of higher concentration. Cell membrane Forms a boundary between a cell and the surrounding environment and controls the passage of materials into and out of the cell. Concentration gradient Difference in the concentration of a substance from one location to another. Diffusion Movement of dissolved molecules in a fluid or gas from a region of higher concentration to a region of lower concentration.
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