BIOL 1141 Chapter Notes - Chapter 6: Myosin Head, Cell Membrane, Reagent

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Energy: the ability to do work or bring about a change. Potential energy: stored energy whose capacity to accomplish work is not being used at the moment. Chemical energy: composed of organic molecules, such as carbohydrates, proteins, and fat. Heat: type of kinetic energy associated with the random motion of molecules. Laws of thermodynamics: two laws explaining energy and its relationships and exchanges. First law of thermodynamics (law of conservation): energy cannot be created or destroyed but can only be changed from one form to another. Entropy: measure of disorder or randomness in a system. Metabolism: the sum of all the chemical reactions that occur in a cell. Products: substances that form as a result of a reaction. Free energy: the amount of energy left to do work after a chemical reaction has occurred. Endergonic reactions: require an input of energy to occur.

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