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| The thin covering that forms the outer boundary of the cell. |
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| allowing only certain molecules to pass through |
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| the passage of substances across a membrane without the use of cellular energy. |
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| the movement of molecules from an area of high concentration to an area of lower concentration;a form of passive transport |
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| the diffusion of water through a selectively permeable membrane. |
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| the passage of particles through a membrane, requiring the use of cellular energy |
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| a rigid structure manufactured by certain organisms and secreted to the exterior of the cell membrane; plants, fungi, and bacteria have cell walls. |
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| Any of a number of organized or specialized structures within a living cell. |
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| the cellular organelles in which aerobic respiration occurs to release usable energy from food. |
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| A cellular organelle consisting of a network of membranes; enables substances to be transported throughout the cell |
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| a cellular organelle that directs the assembling of proteins |
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| a cellular organelle that collects chemicals from the cytoplasm, processes them, and secretes them. |
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| a membrane-bound sac that contains various substances including water and wastes within a cell. |
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| an organelle that contains digestive enzymes. |
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| a cellular organelle that contains chlorophyll and other pigments |
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| short hairlike extensions from a cell membrane; aid in movement |
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| long hair like extensions from a cell membrane; aid in movement |
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| the cellular organelle that contains the chromosomes; control center of the cell |
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| a strand of DNA with associated proteins; usually found in the nucleus of the cell; the bases of heredity |
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