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Cell Respiratio2 - Cell Respiration Metabolism Basics of...

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Cell Respiration Metabolism Basics of Metabolism Metabolism is a process of energy acquisition and conversion. It is necessary because organisms are constantly undergoing cellular changes--they are not in a state of equilibrium. Metabolism is an attempt to regulate cellular conditions by making internal changes to maintain a steady cellular state. As a general rule, nature's tendency is towards conditions of disorder. This means that disorderly conditions are energetically favorable--they release energy. Highly ordered and organized conditions are not energetically favorable and require energy to occur. As a result, the thousands of reactions that constantly occur inside us to maintain cellular organization need energy. The body produces this needed energy by breaking down ATP, and then using this energy to promote energetically unfavorable, but biologically necessary reactions. In order to begin any of these processes, cells need an external energy source. The breakdown of the external source can provide the energy that can couple to drive other reactions. Cells acquire
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