Chapter 8 Metabolism

Chapter 8 Metabolism - Chapter 8 Introduction to Metabolism...

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Chapter 8 Introduction to Metabolism
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Metabolism Energy & Its forms: Kinetic, Potential, Chemical, Thermal 1 st and 2 nd Laws of Thermodynamics Free Energy: G = H – TS ATP: What it is/How it works Enzymes and Activation Energy Controlling Metabolism
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Metabolism
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Metabolism Metabolism = the totality of an organism’s chemical reactions Reactions alter molecules in a series of steps Catabolic reactions Breaking down Anabolic reactions Building up, synthesis
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Thermodynamics 1 ST LAW Energy is neither created nor destroyed Energy can be transformed from one form to another in order to do work
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Energy Transformation Energy: Kinetic & Potential What provided the E for the boy to slide? Where did THAT E come from and what kind of E is it?
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Energy transformation Boy slides Boy climbs Boy eats Food’s chemical E Light E converted to kinetic to potential to kinetic chemical transformed to kinetic (muscle) photosynthesis During these energy transfers, some energy is not harnessed to do work but is lost as thermal energy or heat.
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Thermodynamics 2 ND LAW of thermodynamics E transfer increases Disorder [entropy (S) of the universe increases] More random = more disorder Heat is a highly unordered state of E. Often during energy transfer some is lost as thermal energy that does not contribute to doing work but does
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Chapter 8 Metabolism - Chapter 8 Introduction to Metabolism...

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