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Definition
| maintaining a stable internal enviroment |
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| When a change in a variable triggers mechanisms that reverse that change |
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| a type of control in which a change triggers mechanisms that amplify that change |
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| A protein hormone, produced by beta cells in the pancreas, that lowers the level of glucose in the blood |
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| A peptide hormone, produced by alpha cells in the pancreas, that raises the level of glucose in the blood |
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| A serious hormonal disease in which body cells are unable to absorb glucose from the blood; develops when there is not enough insulin in the blood or when body cells do not respond normally to blood insulin |
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| insulin-dependent, autoimmune disease in which white blood cells of the body's own immune system attack and destroy beta cells in the pancreas |
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| non-insulin-dependent disease characterized either by a deficiency of insulin or, more commonly, by reduced responsiveness of target cells due to changes in insulin receptors |
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| when people have hyperactive beta cells that put too much insulin into the blood when sugar is eaten |
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| A type of sleep where metabolism and temperature are lower than normal but the animal can be awakened |
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| a long-lasting torpor in cold weather, a state of suspension from which the animal cannot be easily aroused |
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| An animal which derives most of its heat from its own metabolism |
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| An animal which gains most of its heat from external sources |
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| the transfer of thermal motion (heat) between molecules of objects that are in direct contact; always moves from high to low |
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| the transfer of heat by the movement of air or liquid past a surface |
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| the emission of electromagnetic waves |
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| the loss of heat from the surface of a liquid that is losing some of its molecules as a gas |
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| the entire portion of Earth inhabited by life; the sum of all the planet's ecosystems |
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| a living component of a biological community |
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| A nonliving component of an ecosystem, such as air, water, or temperature |
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