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six classes of enzymes
oxidoreductase, transferases, hydrolases, lyases, ligases, isomerases
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hydrolases
ACP, ALP, AMY (amylase)
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oxidoreductase
LD, g-6-pdh
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transferases
AST, ALT, CK, GGT
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Enzymes catalaze physiologic reactions by
lowering the activation energy that substrate must reach
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One major influence on enzymatic reactions
substrate concentrations
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With the amount of enzyme exceeding the amount of substrate reaction rate
increases steadily as substrate added
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first order kinetics
reaction rate is directly proportional to substrate concentration
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when substrate concentration is high enough to saturate all enzymes
Velocity reaches its max
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zero order kinetics
dependent only on enzyme concentration
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