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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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

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 ... show full transcript

Worked Solution & Example Answer: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

The correct answer is C: mucus. In cystic fibrosis, the lungs produce thick mucus that can block airways, making it difficult for the lungs to function properly.

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 who has cystic fibrosis may have more lung infections due to the accumulation of thick mucus in the lungs. This mucus traps bacteria and other pathogens, creating an environment conducive to infections. Additionally, the impaired function of cilia, which helps to clear mucus and pathogens from the airways, further increases susceptibility to infections. As a result, individuals with cystic fibrosis are at a higher risk of respiratory infections.

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