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idea that all living things are composed of cells, cells are the basic units of structure and function in living things, and new cells are produced from existing cells
defines the boundary of the cell and regulates the traffic of chemicals between the cell and its surroundings
the net movement of the particles of a substance from where they are more concentrated to where they are less concentrated
selectively permeable membrane
membrane that allows some substances to pass more easily than others and blocks the passage of some substances altogether
process by which a cell takes material into the cell within vesicles that bud inward from the plasma membrane
an organelle that modifies, stores, and routes proteins and other chemical products to their next destinations
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