CIE iGCSE Co-Ordinated Science B7.2 Digestive system Exam Style Questions Paper 1
Question
The diagram shows the human digestive system.
Where do digestion, egestion, ingestion, and absorption take place?
▶️Answer/Explanation
Answer: B
Explanation: Digestion occurs in the stomach (2), egestion occurs in the large intestine (4), ingestion occurs in the mouth (1), and absorption occurs in the small intestine (3).
Question
Which term is defined as the movement of digested food molecules into the cells of the body where they are used?
A. assimilation
B. absorption
C. egestion
D. ingestion
▶️Answer/Explanation
Answer: A
Explanation: Assimilation is the process by which digested food molecules are taken up by cells and used for energy, growth, and repair.
Question
What is the name of the process which moves soluble food molecules through the wall of the small intestine into the blood?
- A. absorption
- B. assimilation
- C. digestion
- D. ingestion
▶️Answer/Explanation
Answer: A. absorption
Explanation: Absorption is the process by which soluble food molecules pass through the wall of the small intestine into the bloodstream.
Question
What is assimilation?
A the movement of digested food molecules into the cells of the body where they are used, becoming part of the cells
B the movement of digested food molecules through the wall of the intestine into the blood
C the passing out of food that has not been digested, as faeces, through the anus
D the taking of food and drink into the body through the mouth
▶️Answer/Explanation
Ans :A
Question
The diagram shows part of the digestive system.
Which labelled parts produce digestive enzymes, absorb water and store bile?
▶️Answer/Explanation
Ans :C
Question
The diagram shows part of the human alimentary canal.
Which row identifies P, Q and R?
▶️Answer/Explanation
Ans: D
Question
The diagram shows part of the human alimentary canal and associated organs.
▶️Answer/Explanation
Ans:- D
Question
The diagram shows part of the alimentary canal and associated organs.
Where is lipase produced?
▶️Answer/Explanation
Answer: A
Explanation: Lipase is an enzyme that breaks down fats into fatty acids and glycerol. It is produced in the pancreas and secreted into the small intestine, where it acts on dietary fats. The stomach produces pepsin, the small intestine produces various enzymes, and the liver produces bile, so options B, C, and D are incorrect.
Question
Into which part of the alimentary canal does the pancreas release digestive juices?
A) anus
B) large intestine
C) oesophagus
D) small intestine
▶️Answer/Explanation
Answer: D) small intestine
Explanation: The pancreas releases digestive juices into the small intestine, specifically the duodenum, where they help in the digestion of carbohydrates, proteins, and fats.
Question
The diagram shows the human alimentary canal.
What is the name of organ X and which process occurs here?
▶️Answer/Explanation
Answer: C. small intestine – absorption
Explanation: The small intestine is the primary site for the absorption of nutrients from digested food. The large intestine is mainly involved in the absorption of water and the formation of feces.
Question
Which process can be defined as the movement of small, water-soluble food molecules through the wall of the intestine into the blood?
A. absorption
B. assimilation
C. digestion
D. egestion
▶️Answer/Explanation
Answer: A. absorption
Explanation: Absorption is the process by which small, water-soluble food molecules pass through the wall of the intestine into the bloodstream. This is a key step in the digestive process, allowing nutrients to be transported to cells throughout the body.
Question
The diagram shows some parts of the alimentary canal and its associated organs.
Which organs produce digestive enzymes?
A. P and Q
B. Q and R
C. R and S
D. S and P
▶️Answer/Explanation
Answer: B. Q and R
Explanation: The pancreas (Q) and the small intestine (R) produce digestive enzymes that help break down food into smaller molecules for absorption.
Question
Where is bile stored?
A gall bladder
B liver
C pancreas
D stomach
▶️Answer/Explanation
Answer: A
Explanation: Bile is produced in the liver but stored in the gall bladder until it is needed for digestion.
Question
Where does most absorption of digested food take place?
A. the large intestine
B. the liver
C. the small intestine
D. the stomach
▶️Answer/Explanation
Answer: C
Explanation: The small intestine is the primary site for the absorption of digested food. It has a large surface area due to the presence of villi and microvilli, which facilitate the absorption of nutrients.
Question
What is the correct definition of ingestion?
A. The breakdown of large, insoluble food molecules into small, water-soluble molecules.
B. The movement of digested food molecules through the wall of the small intestine into the blood.
C. The passing out of food that has not been digested, as faeces, through the anus.
D. The taking of substances into the body through the mouth.
▶️Answer/Explanation
Answer: D
Explanation: Ingestion refers to the process of taking food or other substances into the body through the mouth. It is the first step in the digestive process.