Metabolism bio
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18 terms
Terms | Definitions |
|---|---|
 Metabolism | totality of an organism's chemical reactions |
| Catabolic Pathways | release energy by breaking down complex molecules to simpler molecules |
| Anabolic Pathways | Consume energy to build complicated molecules from simpler compounds |
| Bioenergetics | study of how organisms manage their energy resources |
| Energy | capacity to do work |
| Kinetic energy | energy associated with the relative motion of objects |
| Heat or thermal energy | kinetic energy associated with the random movement of atoms or molecules |
| Potential energy | energy that matter possesses because of its location or structure |
| chemical energy | form of potential energy stored in molecules because of the arrangement of their atoms |
| Thermodynamics | study of energy transformations |
| 1st law | energy cannot be created or destroyed |
| entropy | quantity used as a measure of randomness |
| 2nd law | energy transfer increases the entropy of the universe |
| spontaneous | process that occurs without the input of the energy |
| free energy | portion of a system's energy that is able to perform work when temp and pressure is uniform throughout the system, as in a living cell |
| exergonic reaction | net release of free energy; negative |
| endergonic reaction | absorbs free energy from its surroundings |
| energy coupling | cells manage their energy resources to do work, the use of exergonic process to drive an endergonic one |
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