Formative Practice 9.5 (Form 4 Biology Textbook Exercise and Answer)

Question 1:
In your opinion, why is fibre important in the defaecation process. Explain your answer.

The intake of a high-fibre diet facilitates the movement of faeces and prevents health conditions such as constipation, colon cancer, rectal cancer and haemorrhoids. Some of the functions of fibres are to stimulate peristalsis, absorb and dispose off toxins, regulate glucose absorption especially in diabetic patients, and increase the bacterial population in the large intestine.

Question 2:
Predict the effect of modifying digestive organs such as gastric bypass on human health.

Gastric bypasses involves the reduction of the stomach’s size using diverse operative methods. Among the short-term side effects are acid reflux, nausea and vomiting, dilated esophagus, prohibition of certain types of foods, risk of infection and body weight gain or loss. Long term side effects include nausea and dizziness, low blood sugar, malnutrition, stomach ulcer and complications in bowel movement.

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