Chemical Digestion
Chemical digestion involves the break down of large, usually insoluble molecules to smaller, soluble
molecules by enzymes. The products of digestion can then pass through the intestine wall into our
bloodstream.
Fill in the gaps below using these words
amino acidic mouth pancreas intestine glucose lipase pepsin stomach salivary
acids amylase fatty acids trypsin maltose glycerol small intestine maltose amino acids
1) CARBOHYDRATE DIGESTION
Starch digestion begins in the _____ and is completed in the _____ _________. Large starch
molecules are broken down initially to _______. In the mouth amylase is secreted from the
_________ glands to start off starch digestion. Digestion of starch does not happen in the stomach
as it’s too ______. Amylase produced by the ________ and secreted into the small intestine
completes the breakdown of starch to maltose. _______ made by the small intestine then breaks
down the maltose to _______.
2) PROTEIN DIGESTION
Protein digestion begins in the _______ where protein is broken down into short chains of amino
acids by the enzyme ______. This takes place in ______ conditions. Protein digestion is completed in
the small intestine, where _______ breaks down the short chains of amino _____ to single _____
acids.
3) LIPID DIGESTION
Lipid digestion only takes place in the small _________. ______ breaks the lipid down to _____
_____ and glycerol.