Respiratory adaptations · Physiology

Which adaptation improves oxygen uptake during endurance training?

  1. Chronically reduced alveolar ventilation at rest
  2. Increased capillary density in lungs
  3. A decrease in circulating hemoglobin concentration
  4. Increased resistance across the conducting airways
Show answer and explanation

Correct answer: Increased capillary density in lungs

Increased pulmonary capillary density enhances gas exchange efficiency. This supports higher oxygen uptake during exercise.

Difficulty: Medium Question 8 of 20

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