Chapter: 04. Human Digestive System
Section A: Multiple Choice Questions (5 Marks)
Choose the correct option for each question.
Which of the following is an energy-giving nutrient?
(a) Vitamins
(b) Proteins
© Carbohydrates
(d) Minerals The process of breaking down complex food into simpler molecules is called:
(a) Ingestion
(b) Absorption
© Digestion
(d) Assimilation Which part of the digestive system is a J-shaped muscular bag?
(a) Oesophagus
(b) Small intestine
© Stomach
(d) Liver Hydrochloric acid (HCl) in the stomach primarily helps to:
(a) Digest fats
(b) Make food alkaline
© Kill bacteria in food
(d) Absorb nutrients Which of these is a common symptom of indigestion?
(a) Healthy skin
(b) Bloating of stomach
© Increased energy
(d) Strong bones Section B: Fill in the Blanks (5 Marks)
Complete the following sentences with the correct word(s).
Fats produce more energy than _ _ _ _ _ _ _ _ _ _ _ _ _ _. The removal of undigested solid food from the body is called _ _ _ _ _ _ _ _ _ _ _ _ _ _ or defecation. The opening of the oesophagus into the stomach is guarded by the _ _ _ _ _ _ _ _ _ _ _ _ _ _ sphincter. Bile juice is produced by the _ _ _ _ _ _ _ _ _ _ _ _ _ _ and stored in the gall bladder. Enzymes are called _ _ _ _ _ _ _ _ _ _ _ _ _ _ because they speed up chemical reactions in the body. Section C: True or False (5 Marks)
State whether the following statements are True or False.
Our body can produce all the vitamins it needs. No digestion occurs in the oesophagus. Milk teeth include premolars. The small intestine is shorter in length than the large intestine. Eating fast food regularly is an example of a healthy food habit. Section D: Short Answer Questions (5 Marks)
Answer the following questions in one or two sentences.
List two functions of the tongue. Name the end products of carbohydrate digestion. Why is roughage important in our diet? What is the main difference between macronutrients and micronutrients? Section E: Diagram-Based Question (5 Marks)
Observe the diagram of the human digestive system. Identify and label any five parts of the digestive system shown in the diagram.
Section F: Long Answer Questions (5 Marks)
Answer the following questions in 4-5 sentences.
Explain the process of digestion that occurs in the stomach. Describe how the small intestine is specially designed for absorbing nutrients. 
Practice Paper
