Nutrition Protein Metabolism

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Nutrition Protein Metabolism
2012-07-17 19:08:24
Nutrition Protein Metabolism

Nutrition Protein Metabolism
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  1. Most of the proteins of the body are the result of
  2. How are amino acids anabolized
    food proteins broken down to amino acids

    liver reconstructs amino acids

    liver synthesises plasma proteins
  3. What are the plasma proteins that the liver makes
    • albumin
    • coagulation factors
    • immunogobulins
    • antibodies
  4. What does albumin do
    keeps fluids in the vascular system to prevent ascites
  5. What do the immunogobulins aid in
    help make hormones
  6. What enhances the anabolism of proteins
    • GH
    • androgens
  7. Where does the GH come from
    pituitary gland
  8. When does catabolism of protein occur
    if protein is needed for energy
  9. Where does catabolism of protein begin
    liver w/deamination
  10. What is deamination
    when an amino acid breaks off from the amino molecule
  11. What are some dangerous end products of deamination
    • ammonia
    • keto acid
  12. What happens to the ammonia during deamination
    • converted to urea in liver
    • excreted in urine
  13. What happens to the keto acid that is created from deamination
    • enter TCA for energy
    •      OR
    • converted to fat
  14. Where is the only place that deamination can occur
    liver, only spot where ammonia can be converted to urea
  15. What occurs is there is an excessive amounts of protein in a persons diet
    • causes incresed deamination
    • leads to ketosis
    • increased urea excreation
    • stresses liver and kidneys
    • if liver fails it can be neurotoxic from ammonia levels
  16. What is the general recommendations for protein
    no more than twice the RDA
  17. What is the RDA for protein
  18. What does a complete protein contain
    all 9 EAA
  19. How are protein foods categorized
    by EAA (essential amino acids)
  20. What does a high quality protein contain
    best balance of essential & nonessential amino acids
  21. What are 2 highest quality protein foods
    • eggs
    • milk
  22. what does an incomplete protein lack
    one or more of the essential amino acids
  23. What is a limiting amino acid
    the amino acis that an incomplete protein is missing
  24. What are complementary proteins
    different plants (incomplete proteins)to eat together to add up to one complete protein source
  25. What are the advantagegs of complementary proteins
    • lower cost
    • less dietary fat
    • increased dietary fiber
  26. What are some examples of complementary proteins
    • grains w/legumes
    •       Or
    • grains, legumes, & animal protein
  27. What is the RDA for proteins
    • 10-35%
    • sufficient EAA
    • enough total protein to build NEAA

    depends on age, gender, weight, mental state, and protein sources

    08g/kg(2.2 lbs)
  28. What is the averge protein RDA for a woman, male, and athlete
    • w= 46-50g
    • m=58-63g
    • a=1-1.5g/kg