Nutrients are absorbed in the small intestine

The final digestion of proteins and carbohydrates that produces absorbable products takes place among the microvilli. The mucosal cells with microvilli produce peptidases, which cleave polypeptides into tripeptides, dipeptides, and individual amino acids that the cells can absorb. These cells also produce the enzymes maltase, lactase, and sucrase, which cleave the common disaccharides into their constituent, ab-sorbable monosaccharides: glucose, galactose, and fructose.

50.3 Sources and Functions of the Major Digestive Enzymes of Humans

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