Exchange surfaces and gas exchange

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Question 8
Easy

Tobacco smoke can cause chronic obstructive pulmonary disease (COPD), which damages the alveoli.

A diagram comparing lung tissue. The healthy tissue on the left shows numerous small, rounded alveoli forming a large surface area. The damaged tissue on the right shows broken-down alveolar walls, merging into much fewer, larger air cavities with a reduced surface area.

Use words from the box to complete the sentences.

active transport    diffusion    larger    osmosis    smaller    thicker

Damaged alveoli in a patient with COPD have a ..... total surface area than healthy alveoli. This reduces the rate at which oxygen enters the blood by the process of ..... .

[2]

Exchange surfaces and gas exchange Questions

  1. GCSE
  2. /Biology
  3. /Exchange surfaces and gas exchange