Ijmb Model Questions Vol1 2022 Biology Question 3

Practice essay / theory question 3 from the 2022 Ijmb Model Questions Vol1 Biology examination. This question covers Nutrition, Digestive system, Absorption .

Ijmb Model Questions Vol1 2022 Biology Essay / Theory

Topics: Nutrition Digestive system Absorption

Question 3 IJMB_MODEL_QUESTIONS_VOL1 • 2022 • BIOLOGY • essay

The diagram shows a longitudinal section of the human small intestine with its major regions and microscopic structures labelled.

Question Parts

( a )

Identify the three regions of the small intestine shown in the diagram and state one specific digestive function that occurs in each region.

( b )

Explain how the structural features of the villi and micro‑villi shown in the diagram enhance the efficiency of nutrient absorption.

( c )

If the total surface area of the small intestine without villi and micro‑villi is approximately 0.5 m², and the presence of villi increases this area to 250 m², estimate the factor by which the addition of micro‑villi further multiplies the surface area. Show the reasoning steps you use.

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About This Question

This is Ijmb Model Questions Vol1 2022 Biology Question 3. It is one of the essay questions from the 2022 Ijmb Model Questions Vol1 Biology examination.

The question covers Nutrition, Digestive system, Absorption .

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