Cystic fibrosis (a) The x-ray image on the left shows how cystic fibrosis can affect the human lungs. The x-ray image on the right shows healthy human lungs. (i) Complete the sentence by putting a cross (X) in the box next to your answer. The lungs of a person who has cystic fibrosis can be blocked with: A. carbon monoxide B. cilia C. mucus D. red blood cells (ii) Explain why a person who has cystic fibrosis may have more lung infections than a person who does not have cystic fibrosis.

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Cystic fibrosis (a) The x-ray image on the left shows how cystic fibrosis can affect the human lungs - Edexcel - GCSE Biology - Question 1 - 2017 - Paper 1

Question 1

Cystic fibrosis (a) The x-ray image on the left shows how cystic fibrosis can affect the human lungs. The x-ray image on the right shows healthy human lungs. (i) C... show full transcript

Worked Solution & Example Answer:Cystic fibrosis (a) The x-ray image on the left shows how cystic fibrosis can affect the human lungs - Edexcel - GCSE Biology - Question 1 - 2017 - Paper 1

Step 1

Complete the sentence by putting a cross (X) in the box next to your answer.

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Answer

C. mucus

Cystic fibrosis leads to the production of thick and sticky mucus in the lungs, which can obstruct airways and trap bacteria. This mucus buildup can cause blockages and promote infections.

Step 2

Explain why a person who has cystic fibrosis may have more lung infections than a person who does not have cystic fibrosis.

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Answer

A person with cystic fibrosis often has thick, sticky mucus that accumulates in the lungs. This creates an environment where bacteria can thrive, leading to frequent lung infections. The impaired clearance of pathogens from the lungs due to the buildup of mucus further contributes to the increased risk of infections.

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