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Terms in this set (11)
Requires the use of ATP energy; moving molecules from low concentrations to high concentrations (the opposite of diffusion).
Movement of molecules from an area of high concentration to an area of low concentration (molecules spread out).
A protein that increases the rate of a chemical reaction without being changed by the reaction; an organic catalyst.
Occurs when outputs of a system are "fed back" as inputs as part of a chain of cause-and-effect that forms a cycle. Maintains homeostasis.
Breakdown of food substances into simpler (smaller) forms that can be absorbed and used.
Combining of small molecules or substances into larger, more complex ones.
A protein hormone synthesized in the pancreas that regulates blood sugar levels by causing sugar to leave the blood and enter target cells.
Digestive organ that regulates the hormones insulin (lowers blood sugar) and glucagon (raises blood sugar).
Protein molecules in the cell membrane that can receive chemical messages from other cells.
A tendency to maintain a balanced or constant internal state; the regulation of any aspect of body chemistry, such as blood glucose, around a particular level.
Another term for homeostasis.
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