Home/
Competitive Exams/
NEET/
Biology/
Breathing and Exchange of Gases/
Question 9256
NEET Biology · Hard

Breathing and Exchange of Gases: Forces MCQ

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

Timer-based practiceDetailed answer reviewMobile-friendly flow
ForcesHardQuestion 9256

Question

The immediate cause of air entering alveoli is best described as:

  1. A
    Movement down a pressure gradient
    Correct
  2. B
    Active pumping by RBCs
  3. C
    Diffusion down a glucose gradient
  4. D
    Contraction of alveolar cartilage

Correct answer

Movement down a pressure gradient

Explanation

Bulk flow of air during breathing occurs because of pressure differences between atmosphere and lungs.

Review Breathing and Exchange of Gases notesStart timed chapter practice