CAIE IGCSE Biology 7.3.7 Bile & Fat Emulsification

Practise explaining how bile emulsifies large fat globules into smaller droplets, increasing surface area for lipase without chemically digesting the fat molecules.

Exam points

state that bile emulsifies large fat globules into smaller droplets
explain that emulsification increases the surface area available for lipase or other digestive enzymes
state that emulsification occurs in the small intestine or duodenum before chemical digestion by lipase

[Maximum number: 4]

Bile is involved in fat digestion.

Complete the sentences about fat digestion.

Bile is released into the in the digestive system. Bile increases the surface area of fats and oils. This is called This increase in surface area increases the rate of digestion using the enzyme .

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7.3.7—Bile and fat emulsification question 1