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SingaporeBiologyQuick questions
Respiration and Gas Exchange
Quick questions on Breathing and ventilation explained: O-Level Biology
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is breathing is not respiration?Show answer
Breathing (ventilation) is the movement of air into and out of the lungs. Respiration is the chemical release of energy from glucose in cells. Breathing supplies the oxygen that respiration needs and removes the carbon dioxide it makes; they are linked but different.
What is q1?Show answer
State the difference between breathing and respiration. [2 marks]
What is q2?Show answer
Describe what the diaphragm does during inhalation. [1 mark]
What is q3?Show answer
Explain why air enters the lungs when the chest volume increases. [2 marks]
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