Trachea Histology · Histology

What histological change is commonly seen in the trachea of individuals with Vitamin A deficiency?

  1. Hypertrophy of the trachealis muscle
  2. Squamous metaplasia of the respiratory epithelium
  3. Increased thickness of the hyaline cartilage rings
  4. Disappearance of the submucosal glands
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Correct answer: Squamous metaplasia of the respiratory epithelium

Vitamin A is essential for the maintenance of epithelial types. Deficiency can cause the pseudostratified ciliated columnar epithelium to transform into a stratified squamous epithelium, compromising the mucociliary escalator.

Difficulty: Medium Question 13 of 20

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