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Digestion, absorption and mass transport in animals

Exchange and transport · Lesson 2 of 4

Lesson 2 of 4

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Lesson 2 of 4 · Exchange and transport

Digestion, absorption and mass transport in animals

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Explain why large biological molecules must be hydrolysed before absorption and describe the roles of carbohydrases, lipases and proteases in digestion.
Describe the gross structure and functions of the mammalian alimentary canal and associated glands, including the stomach, pancreas, liver, gall bladder and small intestine.

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Explain the digestion and absorption of carbohydrates, lipids and proteins, including the roles of bile in emulsification and alkaline conditions, and the formation of fatty acids, monoglycerides, amino acids and monosaccharides.

Relate the structure of the ileum to its function in absorption, including villi, microvilli, epithelial thickness, blood capillaries and lacteals.

Explain the absorption of the products of digestion by diffusion, facilitated diffusion, active transport and co-transport where applicable.

Describe the transport of absorbed products, including water-soluble products in the blood and lipid products via epithelial cells into lacteals and the lymphatic system before entry to the blood.

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