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CAIE IGCSE Biology 7.5.3 Significance of Villi and Microvilli Questions

Practise explaining how villi and microvilli on small-intestine epithelial cells increase membrane surface area for faster nutrient absorption.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • Explain how villi and microvilli increase small-intestine surface area for nutrient absorption.
  • Use villus or microvillus evidence to explain differences in small-intestine absorption efficiency.

CAIE IGCSE Biology 7.5.3 Significance of Villi and Microvilli Questions question 1

[Maximum number: 2]

Fig. 1.1 shows several villi from the ileum, which is part of the small intestine.

Fig. 1.2 shows the tip of a villus in more detail.

Fig. 1.2

Fig. 1.2

The epithelial cells of the villi absorb nutrients by diffusion and active transport.

Explain the importance of the microvilli shown in Fig. 1.2.

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