Alveolar Ventilation

Question 1

Regional differences

Answer 1

Base: better ventilation, alveoli smaller and more compliant, smaller transmural pressure, intrapleural pressure higher
FRC: ventilation best at base
TLC: ventilation equal b/n base and apex
RV: ventilation best at apex
Normal quiet breathing, base has greatest ventilation

Question 2

Local alveolar ventilation

Answer 2

V/Q = T = RxC

Time it takes for local alveolar airway unit to ventilate