When Blood Flow to an Area of the Lungs Is

Multiple Choice

When blood flow to an area of the lungs is reduced but the area receives normal air flow all of the following occur except

A) the concentration of CO₂ in this area will be decreased.
B) the change in CO₂ concentration will cause the smooth muscles of the local airways to relax.
C) the change in CO₂ concentration will lead to increased resistance of local airways.
D) the change in O₂ concentration will lead to dilation of local blood vessels.
E) the change in O₂ concentration will lead to decreased vascular resistance.