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Cells
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Question | Answer |
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any of a number of organized or specialized structures within a living cell | organelles |
the semipermeable membrane surrounding the cytoplasm of a cell | cell membrane |
a microscopic membrane of lipids and protiens that forms the external boundary of the cytoplasm of a cell or encloses a vacuole, and that regulates the passage of molecules in and out of the cytoplasm | plasma membrane |
substances outside the cell | extracellular substance |
substances inside the cell | intracellular substance |
studies of the arrangements of molecules in the cell membrane have given rise to a model of its structure | mosaic model |
powerhouse and brain of the cell | nucleus |