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Respiration and Gas Exchange
Quick questions on Gas exchange in humans 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 gas exchange at the alveoli?Show answer
Gas exchange happens in the alveoli, where the air is very close to the blood in the surrounding capillaries:
What is q1?Show answer
Name the tiny air sacs where gas exchange occurs. [1 mark]
What is q2?Show answer
State two ways an alveolus is adapted for gas exchange. [2 marks]
What is q3?Show answer
Explain why exhaled air contains more carbon dioxide than inhaled air. [2 marks]
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