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The Respiratory System — Practice Quiz

ICSE · Class 9 · Biology

Try a 4-question quiz on The Respiratory System for ICSE Class 9 Biology: tap an answer to check it and see why. 45 questions in the full chapter test.

45 questions40 flashcards5 concepts

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A high-level flowchart illustrating the three main stages of aerobic cellular respiration: Glycolysis, Krebs Cycle, and Electron Transport System, along with their respective locations within the cell
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Quick Quiz: The Respiratory System

0/4

Tap an answer to check it instantly. No sign-up needed for these 4.

1

What is the main function of respiration?

2

The voice box is also known as:

3

What is the normal breathing rate in healthy adults per minute?

4

The tiny air sacs in the lungs are called:

45 Questions·
multiple choicemultiple correcttrue false

Sample Questions

1multiple correct

Which of the following are products of aerobic respiration? (Select all correct answers)

Show answer

Carbon dioxide, Water, Energy (ATP)

The equation for aerobic respiration is: C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy. The products are carbon dioxide, water, and energy in the form of ATP.

2true false

Anaerobic respiration in animals produces lactic acid.

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True

In animals, anaerobic respiration breaks down glucose to produce lactic acid (not CO₂). This happens in muscles during intense exercise when oxygen supply is insufficient.

3multiple correct

Which muscles are involved in inspiration (breathing in)? (Select all correct answers)

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Diaphragm, External intercostal muscles

During inspiration, the diaphragm contracts and flattens while external intercostal muscles contract to lift the ribs upward and outward, increasing chest cavity volume.

4true false

Tidal volume refers to air that can be forcibly expelled after normal expiration.

Show answer

False

Tidal volume is the air breathed in and out during normal, quiet breathing (500 mL). The air that can be forcibly expelled after normal expiration is called expiratory reserve volume.

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Frequently Asked Questions

What are the important topics in The Respiratory System for ICSE Class 9 Biology?
Key topics in The Respiratory System include Need for Respiration and Cellular Respiration, Aerobic and Anaerobic Respiration, Parts of Respiration, Respiratory Organs and Their Functions. Study these first, then practise questions on each for Class 9 exams.
How many practice questions are there for The Respiratory System?
There are 45 questions on The Respiratory System. Try the 4-question sample quiz on this page first; each answer shows an explanation when you tap it.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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