Low PO2 and high PCO2 in the alveoli will cause:
a. constriction of pulmonary capillaries and bronchioles.
b. dilation of pulmonary capillaries and bronchioles.
c. constriction of pulmonary capillaries and dilation of bronchioles.
d. dilation of pulmonary capillaries and constriction of bronchioles.
Answer: C
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