Concerning normal expiration during resting conditions:
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.
Expiration is generated by the expiratory muscles
Alveolar pressure is less than atmospheric pressure
Intrapleural pressure gradually falls (becomes more negative) during the expiration
Flow velocity of the gas (in cm/sec) in the large airways exceeds that in the terminal bronchioles
Respiratory System Pa 1