IMED1003 Lecture Notes - Lecture 9: Activation Energy, Adenine, Acetyl-Coa
17 Sep 2018
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Document Summary
Bioenergetics and energy stores: have a basic understanding of energy and the laws of thermodynamics. How organisms manage energy resources via metabolic pathways. Catabolic pathways (catabolism) release energy- breaking complex molecules into simpler ones. Anabolic pathways (anabolism) consume energy- build complex molecules from simpler ones. Energy = capacity to do work or cause change. Forms of energy (can be interconverted: potential energy= stored energy (includes chemical energy in molecules, kinetic energy= currently causing change, involves some type of motion. Work is different to energy: energy is a very broad spectrum. This tells us the changes in energy in reactions. Related change in enthalpy with the absolute temperature and the change in entropy. Because we have to put in energy, to decrease the entropy. Equation describes change in free energy when accounting for transfer of heat (enthalpy, h) & change in disorder (entropy, s) of the system. In the context of energy exchange, entropy= energy unavailable for use.
