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Biology · PYQ NEET UG 2019(2)

हिन्दी

Select the CORRECT statement.

  1. A
    Expiration is initiated due to contraction of diaphragm.
  2. B
    Expiration occurs due to external intercostal muscles.
  3. C
    Intrapulmonary pressure is lower than the atmospheric pressure during inspiration.
  4. D
    Inspiration occurs when atmospheric pressure is less than intrapulmonary pressure.
View Answer & Solution

Correct answer · Option C

Intrapulmonary pressure is lower than the atmospheric pressure during inspiration.

Explanation

During inspiration, contraction of diaphragm and intercostal muscles increases thoracic volume, decreasing intrapulmonary pressure below atmospheric pressure.
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