Absorption is the process by which the end products of digestion pass,
through the intestinal mucosa into the blood or lymph. It is carried out by
passive, active or facilitated transport mechanisms. Small amounts of
monosaccharides like glucose, amino acids and some electrolytes like
chloride ions are generally absorbed by simple diffusion. The passage ou
these substances into the blood depends upon the concentration gradients
However, some substances like glucose and amino acids are absorbed with
the help of cartier proteins. This mechanism is called the facilitated transport
Transport of water depends upon the osmotic gradient. Active
transport occurs against the concentration gradient and hence requires
energy. Various nutrients like amino acids, monosaccharides like glucose
electrolytes like Na' are absorbed into the blood by this mechanism.
Fatty acids and glycerol being irisoluble, cannot be absorbed into the blood.
I can't understand some lines clearly as they mentioned glucose for several times in different methods of absorption. could anyone please explain me?
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