1a) If the ventilation/perfusion ( V/Q) ratio of a lung region
decreases, how will the PO2 and PCO2 in the
blood in that region change?
1b) In perfusion-limited O2 exchange, is the
PO2 at the end of the pulmonary capillary closer to
PA,O2 or PV,O2?
1c) Which of the following is/are higher at the base of the lung
than at the apex: blood flow, V/Q, ventilation, PO2,
PCO2?
Please explain your answers briefly and accurately.