Anita Akweshie-
metabolic reactions in the body produce
waste products
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the process of removal of metabolic waste products from the body
excretion
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which two excretory products are formed in much greater quantities than the rest
carbon dioxide and urea
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where is urea produced
in the liver
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what is urea produced from
excess amino acids
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true ? false
excess amino acids can be stored in the body
false
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how to make the energy stored in the amino acids in the proteins accessible
process of deamination
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deamination step 1
the amino group (-NH2) of an amino acid is removed together with an extra hydrogen atom
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deamination step 2
amino group and hydrogen atom combine to form ammonia
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deamination step 3
remaining keto acid may enter the krebs cycle to be respired, be converted to glucose or converted to glycogen/fat for storage
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properties of ammonia
very soluble
highly toxic compound
produced during deamination
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what is the danger of ammonia in the body
can be very damaging if allowed to build up in the body
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how is damage by ammonia avoided by the body
by converting ammonia to urea
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why is urea better to have in the body than ammonia
urea is less soluble and less toxic than ammonia
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how is urea formed
ammonia is combined with carbon dioxide
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chemical formula for urea
2 NH3 + CO2 = CO(NH2)2 + H2O
