Biol_1001_Chap6-1

Biol_1001_Chap6-1 - NOTES FOR BIOLOGY 1001 SECTIONS 003 and...

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Unformatted text preview: NOTES FOR BIOLOGY 1001 SECTIONS 003 and 007 Fall 2011 DR. STEVEN POMARICO, INSTRUCTOR CHAPTER 6 ENERGY FLOW IN THE LIFE OF A CELL >>>MATTER AND ENERGY Some basics you should know:--- matter is anything that takes up space and has mass-the physical material of the universe--- Energy is the capacity to do work. There are two major categories of energy 1) potential energy 2) kinetic energy--- Potential energy is energy stored in matter because of its position or location.--- Kinetic energy is the energy of motion. Rubber band analogy Potential energy in biological systems can be stored in chemical bonds >>>The Laws of Thermodynamics Describe the Properties of Energy 1 Energy transfer by organisms is subject to two laws of thermodynamics --- First Law of Thermodynamics which states that energy can be transferred and transformed, but it cannot be created or destroyed (i.e., the energy of the universe is constant).--- Second Law of Thermodynamics which states that every energy transfer or transformation makes the universe more disordered (i.e., every process increases entropy at the cost of useful energy)--- Entropy is the measure of disorder, randomness If every energy transfer loses energy, why doesn’t life on the planet simply run out of energy? The planet isn’t a closed system. Energy is constantly flowing in from the sun. The universe is a closed system and the solar system is almost a closed system. All other closed systems are created in the lab....
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This note was uploaded on 10/25/2011 for the course BIOL 1001 taught by Professor Minor during the Fall '08 term at LSU.

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Biol_1001_Chap6-1 - NOTES FOR BIOLOGY 1001 SECTIONS 003 and...

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