OUTLINE 3a - OUTLINES FOR BIOLOGY 1201 Section 001 Summer...

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OUTLINES FOR BIOLOGY 1201 Section 001 Summer 2008 DR. STEVEN POMARICO Outline 3A CHAPTER 8 AN INTRODUCTION TO METABOLISM Bioenergetics: The Laws of Thermodynamics – 8.2.1 >>>>>The chemistry of life is organized into metabolic pathways --- Metabolism -Uptake of matter and energy -Conversion to usable form -Synthesis of cellular materials -Elimination of waste products Two types of metabolic pathways: Catabolic pathways and anabolic pathways --- Catabolism Pathways involved in degradation -degradation, releases energy --- Anabolism Pathways involved in synthesis -synthesis, consumes energy >>>>>Organisms transfer energy --- Energy The capacity to do work Review types of energy --- Potential energy Positional Water behind a dam --- Kinetic energy Motion Water released from the dam >>>>>Energy transfers are subject to the laws of thermodynamics (see fig 8.3)
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--- First Law of Thermodynamics Energy can be transferred and transformed, but it cannot be destroyed (i.e, the energy of the universe is constant) --- Second Law of Thermodynamics Every energy transfer or transformation makes the universe more disordered (i.e, every process increases entropy) --- Entropy (S) The quantitative measure of disorder that is proportional to randomness
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