B What are the fates of the absorbed food? (Book
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Absorbed food
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Fate
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Glucose
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n used by body cells for releasing energy by (8) respiration
n excess glucose are converted to:
l (9) glycogen and stored in liver and muscles
l lipids in the liver for storage
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Amino acid
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n used by cells to make different (10) proteins:
l structural molecules for growth and repair
l functional
molecules, e.g. (11) enzymes, antibody and hormones
n excess amino acids are (12) deaminated in the liver:
l amino
group is
converted to (13) urea (尿素)
à blood
à
kidney à excreted (排泄) in urine
l remained part à respiratory pathway (呼吸作用途徑) à release energy
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Lipids
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n As energy (14) reserves
n Used to make cell (15) membrane and some hormones
n stored
in (16) adipose tissue if in excess:
l Deposited around the internal organs
l build
up under skin
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