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What is Concerning normal expiration during resting conditions: and explain in detail?
The velocity of the gas in the large airways exceeds that in the terminal bronchioles because the latter have a very large combined cross-sectional area. The other choices are incorrect: Under resting conditions, expiration is passive it is associated with an alveolar pressure that exceeds atmospheric pressure intrapleural pressure gradually increases (becomes less negative) during expiration and the diaphragm moves up as expiration proceeds.