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7.2 Cell Structure
Definitions on Page 196
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Biology
9th Grade
12/05/2014

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The cytoplasm is the portion of the cell outside the nucleus.
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An organelle is a specialized structure that performs important cellular functions within a cell.
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A vacuole is a cell organelle that stores materials such as water, salts, proteins, and carbohydrates.
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A lysosme is a cell organelle that breaks down lipids, carbohydrates, and proteins into small molecules that can be used by the rest of the cell.
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The cytoskeleton is a network of protein filaments in a eukaryotic cell that gives the cell its shape and internal organization and is involved in movement.
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The centriole is a structure in an animal cell that helps to organize cell division.
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A ribosome is a cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell; the site of protein synthesis.
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The endoplasmic reticulum is an internal membrane system found in eukaryotic cells; place where lipid components of the cell membrane are assembled.
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The Golgi apparatus modifies, sorts, and packages proteins and other materials from the endoplasmic reticulum for storage in the cell or release outside the cell.
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The chloroplast is an organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy.
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Mitochondrion is a cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use.
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The cell wall is the strong, supporting layer around the cell membrane in some cells.
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The lipid bilayer is the flexible double-layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings.
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Selectively permeable is the property of biological membranes that allows some substances to pass across it while others cannot; also called semipermeable membrane.
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