Question

The severity of an obstructive airways disease is indicated by the degree of change in the 

A. Total ventilation/perfusion ratio. 

B. Peak expiratory flow rate. 

C. Respiratory quotient. 

D. Tidal volume. 

E. Work of breathing.

Answer 1

A. False It may well be normal. 

B. True It is a sensitive indicator. 

C. False RQ is related to the mixture of substrates being metabolized. 

D. False This also may be normal. 

E. True This is related to the increased airway resistance.