Question 4 Answer

a) A – Salivary gland

B – Stomach

C – Pancreas

D – Ileum

E – Anus

F – Duodenum

b) i) In the mouth the egg is broken up into smaller pieces by the teeth. It is then sent to the stomach where chemical digestion of protein begins. Here, pepsin converts the proteins to polypeptides. The polypeptides and undigested proteins then move to the duodenum where the polypeptides are converted to amino acids by trypsin from the pancreas. Any remaining polypeptides are converted to amino acids by peptidase in the ileum. The amino acids can now be absorbed by the ileum.

ii) -Its very long

-It has villi which increases surface area

-Contain blood capillary for absorption of glucose and protein

-Contains lacteals for absorption of fat

-Lining is one cell thick

iii) Mr. Atkinson’s grandson needs more carbohydrates for energy as he is more active. He will also need more proteins for growth of cells.

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