Chapter 2 Quiz 🫀
Human Systems · 10 MCQ + 5 Open-Ended
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✏️ Section B — Open-Ended Questions
Write your answer first, then reveal the model answer to check.
Q11
Explain why digestion is important to the human body. [2]
Food gives the body energy and the materials it needs to function properly. However, food must first be broken down into simpler substances through digestion before it can be absorbed into the blood and used by the body.
Q12
A student says “the gullet is where most digestion takes place.” Do you agree? Explain your answer. [2]
I disagree. No digestion occurs in the gullet at all — it produces no digestive juice and simply pushes food from the mouth into the stomach. The organ where digestion is completed is the small intestine.
Q13
Explain why the small intestine is important in digestion. Give TWO reasons. [2]
- The small intestine is where digestion is completed — it produces digestive juice that finishes breaking food into simpler substances.
- It is also where digested food is absorbed into the blood through its walls, so nutrients can reach the rest of the body.
Q14
How do the muscular system and circulatory system support the digestive system? [2]
The muscular system provides the muscle contractions that push food along the digestive tract. The circulatory system then carries the absorbed nutrients — through the blood — to all parts of the body.
Q15
Priya tested whether temperature affects digestion speed. She used two containers with the same amount and type of food and digestive juice — Container A at 20°C and Container B at 37°C. State the changed variable and name ONE other variable she should keep the same. [2]
- Changed variable: temperature (20°C vs 37°C)
- One other variable to keep the same (any one of): size of food pieces / size and type of containers / location where the containers are kept