BIOB34H3 Study Guide - Nadh Dehydrogenase, Membrane Fluidity, Indirect Calorimetry
Document Summary
However, they actually start simple and undergo progressive development. 1st law of thermodynamics: total energy never changes over time. 2nd law of thermodynamics: isolated systems spontaneously move towards disorder. Breaking down the law, we"ll see that the findings don"t necessarily defy it: isolated systems" doesn"t apply to animals. They constantly interact and keep taking energy from environment. The only real isolated" system is the universe. So the law only applies to animals indirectly: although animals are organized, they absorb energy (heat, molecules ) and release it into atmosphere in a more disorganized fashion. Gibbs" free energy: energy released by as process that is available to do work. Some examples of work by animals: mechanical, transport, biosynthesis, light emission, bioluminescence animals use the free energy to keep organized. G is free energy, h is total energy and t s is unavailable energy. For example: glucose + 6 o2 6. More molecules are available so there"s more chaos, meaning more entropy.
