Generalized acute hypoxia in lung tissue, when alveolar oxygen levels drop below 60 mm Hg, causes pulmonary:
A) Vasospasms
B) Hypertension
C) Embolus formation
D) Vasoconstriction
Ans: D
Feedback:
Vasoconstriction of pulmonary vessels is a compensatory response to generalized lung tissue hypoxia. Embolus formation causes a localized hypoxic response. Vasospasms are not involved with the hypoxia response by lung tissue. Pulmonary hypertension is the result of chronic lung tissue hypoxia.
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