Antioxidants & Metabolism
ANTIOXIDANTS & METABOLISM
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Antioxidants
Introduction
o These are the molecules that are capable of inhibiting the oxidation of
other molecules
o The reaction of oxidation can form free radicals
o Free radicals starts the chain reactions and damage the cells
o Antioxidants terminates these chain reactions by removing free radical
intermediates
·
Functions
o Boost our immune system
o Effective in heart disease
o Lowers the level of LDL
o Prevent plaque deposition in blood vessels
o Beneficial in cancer prevention
o Neutralize substances that can damage the genetic material by oxidation
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Benefits
o Slow effect of aging on skin
o Protect vision & eyes
o Prevent stroke
o Prevent cancer
o Prevent cognitive decline
Metabolism
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Introduction
o It is the sum of the organism’s chemical reactions
o It is an emergent property of life
o It arises from the interactions between molecules within the cell
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Types
o Catabolism
§ Breaking down of complex molecules into simpler compounds releasing
energy
§ It breaks down the complex molecules into simpler one
§ Its main purpose is to provide the energy and components needed for the
anabolic reactions
o Anabolism
§ Formation of complex molecules from simpler ones by consuming energy
§ It is the set of constructive metabolic processes
§ Energy released by catabolism is used to form the complex molecules
§ It involves three basic stages
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Production of precursors like
o Amino acids
o Monosaccharide’s
o Nucleotides
·
Activation of precursors into reactive
forms by the energy from ATP
·
Assembly of these precursors into
complex molecules such as
o Proteins
o Polysaccharide’s
o Nucleic acids
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