BIOB34H3 Lecture Notes - Lecture 3: Radiant Energy, Food Energy, Chemical Bond
Document Summary
Animal physiology: lecture 3 (thermodynamics: life on earth) Animal work: use chemical energy to generate molecular order: the molecular order makes you who you are. It is dynamic, constant exchange of molecule and atoms w/ environment. You aren"t the same collection of atoms and molecules you were before yet overall same structure (to sustain structure you use the energy from food) Objectives: identify the types of energy animals use, define entropy, define 1st and 2nd law of thermodynamics and how it relates to animals, explain why the 2nd law forces animals to eat food. Energy comes in many different forms: (unit: joules: potential energy: stored energy, can make work happen, but does not perform work. Putting an object on a table it has gravitational potential energy: kinetic energy: energy of movement. Currently causing something to happen in the universe. Object falling off table: radiant energy: transmitted by electromagnetic radiation (ex. microwave).