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Keri sat down this morning to prepare a to-do list for the day. After checking her planner, she added four items to her list. Which of Keri's tasks should be her highest priority?
Simple Diffusion
The movement of molecules from an area of higher concentration to an area of lower concentration without the need for energy input or assistance of membrane proteins.
Cellular Membrane
The cellular membrane, or plasma membrane, is the biological membrane that separates the interior of all cells from the outside environment, controlling the movement of substances in and out of cells.
Exocytosis
The active transport of materials out of the cell by fusion of cytoplasmic vesicles with the plasma membrane. Compare with endocytosis.
Plasma Membrane
The semipermeable membrane surrounding the cytoplasm of a cell, responsible for controlling the passage of substances in and out of the cell.
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