Biology 9700 · AS & A Level · The microscope in cell studies

The microscope in cell studies — practice question

A student had to compare four microscope slides showing sections from different regions of the gas exchange system. Slide 1: missing - cartilage, glands; seen - few goblet cells, ciliated epithelial cells, smooth muscle. Slide 2: seen - incomplete cartilage rings, glands, goblet cells, ciliated epithelial cells, smooth muscle. Slide 3: missing - cartilage, glands, goblet cells, smooth muscle; seen - squamous epithelial cells. Slide 4: seen - plates of cartilage, glands, goblet cells, ciliated epithelial cells, smooth muscle. Which option correctly identifies the parts of the gas exchange system?

  • Aslide 1 alveolus; slide 2 bronchiole; slide 3 bronchus; slide 4 trachea
  • Bslide 1 bronchiole; slide 2 bronchus; slide 3 alveolus; slide 4 trachea
  • Cslide 1 bronchiole; slide 2 trachea; slide 3 alveolus; slide 4 bronchus
  • Dslide 1 bronchus; slide 2 trachea; slide 3 bronchiole; slide 4 alveolus

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