Carbohydrate digestion involves amylase breaking down starch to maltose, and maltase further breaking down maltose to glucose. Other enzymes like sucrase and lactase break down sucrose and lactose, respectively. Absorption occurs in the ileum, with fructose absorbed by facilitated diffusion and glucose/galactose actively absorbed with sodium ions.
Carbohydrate digestion involves amylase breaking down starch to maltose, and maltase further breaking down maltose to glucose. Other enzymes like sucrase and lactase break down sucrose and lactose, respectively. Absorption occurs in the ileum, with fructose absorbed by facilitated diffusion and glucose/galactose actively absorbed with sodium ions.
| Front | Outline the process of carbohydrate digestion and absorption ( 7 marks) |
|---|---|
| Back | Digestion: salivary amylase/pancreatic amylase digests starch/glycogen; to maltose; maltose digested by maltase to glucose; sucrose digested by sucrase to glucose and fructose; lactose digested by lactase to glucose and galactose; lactase/maltase/sucrase are in intestinal juice/succus entericus; Absorption glucose/galactose/fructose absorbed in ileum/small intestine; fructose absorbed by facilitated diffusion; glucose/galactose actively absorbed; in combination with sodium ions/ref carrier protein needs glucose + galactose + Na+ to work; |
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