Home/
Competitive Exams/
NEET/
Biology/
Breathing and Exchange of Gases/
Question 9210
NEET Biology · Medium

Breathing and Exchange of Gases: Thoracic volume MCQ

Solve this quality-checked NEET multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Thoracic volumeMediumQuestion 9210

Question

Elevation of ribs and sternum during inspiration primarily causes:

  1. A
    Increase in thoracic volume
    Correct
  2. B
    Decrease in alveolar number
  3. C
    Closure of bronchi
  4. D
    Rise in pulmonary capillary resistance

Correct answer

Increase in thoracic volume

Explanation

Thoracic expansion lowers pressure inside the lungs and helps air entry.

Review Breathing and Exchange of Gases notesStart timed chapter practice