Enzymes and digestion
In the digestive system, glands secrete digestive enzymes on food to split large insoluble molecules intosmaller ones that can be absorbed into the blood stream.
Amylase catalyses the break down of starch into sugars int the mouth and small intestine.
proteases catalyses the break down of proteins and turns them into amino acids in the stomach and small intestine.
Lipases catalyses the break down of fats and oils into fatty acids and glycerol in the stomach and small intestine.
stomac cells produce hydrochloric acid to provide stomach enymes with their optimum PH.
Liver cells produce bile stored in the gall bladder. Released into the the small intestine, bile neutralises the acidic food from the stomach and provides an alkaline PH for the enzymes of the small intestine.