LE Topic One
Terms
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Excretion -
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The removal of all the wastes produced by the cells of the body -
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Organic -
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Term used to describe molecules that contain both hydrogen and carbon -
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Amino Acids -
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any one of several building blocks of protein -
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Homeostasis -
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The ability of an organisms to maintain a stable internal environment even when the external environment changes -
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Receptor Molecule -
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Certain protein molecules in the cell membrane that can receive chemical messages from other cells -
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Cell -
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The basic unit of structure and function that makes up all organisms -
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Hormone -
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A chemical produced in the endocrine glands -
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Respiration -
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The process by which the chemical bond energy stored in nutrients is released for use in cells -
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Cell Membrane -
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The thin boundary between the cell and its environment -
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Immunity -
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The body's ability to destroy pathogens before they cause disease -
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Reproduction -
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The process by which organisms produce new organisms of the same type -
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Cell Respiration -
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The process in which nutrients are broken apart, releasing the chemical energy stored in them -
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Inorganic -
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A type of molecule that does not contain both carbon and hydrogen but can contain any other combination of elements -
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Ribosomes -
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One of the tiny structures in the cell that is the site of protein production -
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Chloroplast -
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The green organelle that contains chlorophyll; where photosynthesis takes place -
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Metabolism -
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All the chemical reactions that occur within the cells of an organism -
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Simple Sugars -
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The result of digested starches -
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Circulation -
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The flow of materials within a cell as well as between parts of a multicellular organism -
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Mitochondria -
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Pod-shaped organelles that contain enzymes used to extract energy from nutrients -
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Synthesis -
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A life process that involves combining simple substances in to more complex substances -
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Cytoplasm -
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The jellylike substance that is between the cell membrane and the nucleus and that contains specialized structures -
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Nucleus -
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A large structure within a cell that controls the cell's metabolism and stores genetic information, including chromosomes and DNA -
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Tissue -
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A group os specialized cells that perform a specific function -
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Digestion -
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The process that breaks down large food molecules into simpler molecules that the organism can use -
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Organ -
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A body structure made of different kinds of tissues combined to perform a specific function -
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Vacuole -
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Storage sacs within the cytoplasm of a cell that may contain either wastes or useful materials, such as food or water -
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Diffusion -
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The movement of molecules from areas of high concentration to areas of low concentration -
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Organ System -
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Several organs that work together to perform a major function in the body -
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Enzymes -
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Proteins that speed up the rate of chemical reactions in living things -
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Organelle -
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A structure within the cell that carries out a specific function -
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Active Transport -
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The process by which cells use energy to transport molecules through the cell membrane from areas of low concentration to areas of high concentration