Biology 5090 · O Level · Human digestive system

Human digestive system — practice question

Fig. 3.1 illustrates the human digestive system. Fig. 3.2 illustrates a cross-section through organ E in a healthy person and in a person with coeliac disease.
(a(i))[2]

In each box, write the letter used to label these parts of the digestive system: The part where starch digestion starts. The part where protein digestion starts.

(a(ii))[3]

Describe the roles of organs B and C in lipid digestion.

(b(i))[3]

If a child with coeliac disease is not treated, their growth may be reduced. Use Fig. 3.2 to explain why.

(b(ii))[3]

For this treatment to function, the tablet needs a coating that dissolves in alkaline conditions but remains intact in acid conditions. Explain why.

Worked solution & mark scheme

This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: A is where starch digestion begins

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