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Title: Diagram of the Starch Digestion in the small intestine
Description: Diagram explaining the Digestion of starch within the small intestine. Carried out by enzymes in the membranes of the microvilli on villus epithelium cells.
Description: Diagram explaining the Digestion of starch within the small intestine. Carried out by enzymes in the membranes of the microvilli on villus epithelium cells.
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Starch Digestion in the Small Intestine
Starch is an important
component of many human
diets
It occurs as:
Digestion of starch is completed by
enzymes in the membranes of
microvili on villus epithelium cells:
maltase and dextrinase digest maltose
and dextrins into glucose
Amylose
Amylopectin
The process consist on the
following steps:
The food is
chewed
Amylose, as it is
present in the saliva,
gets mixed with th
food and breaks dow
the α-1,4 glycosidic
bonds that connect
the glucose
monomers in
amylose and
amylopectin
...
The di- and tri-saccharides
produced from the starch
molecules are too large to
pass through membranes, so
they need to be broken down
into monomers
(monosaccharides) before
they can be absorbed
...
Three enzymes
that are immobilised in
the epithelial cells of the
small intestine, maltase,
glucosidase and
dextrinase, break down
these molecules into
glucose, which can then
be absorbed by the villi
...
Title: Diagram of the Starch Digestion in the small intestine
Description: Diagram explaining the Digestion of starch within the small intestine. Carried out by enzymes in the membranes of the microvilli on villus epithelium cells.
Description: Diagram explaining the Digestion of starch within the small intestine. Carried out by enzymes in the membranes of the microvilli on villus epithelium cells.