What is the pathophysiologic mechanism behind pulmonary edema?
  1. Increased blood pressure in the blood vessels of the lungs forces fluid into the air sacs; this prevents the absorption of oxygen
  2. Increased blood flow in the blood vessels of the lungs; this prevents gaseous exchange
  3. Decreased blood flow in the blood vessels of the lungs; this prevents gaseous exchange
  4. Decreased blood flow in the blood vessels of the lungs; this prevents air entry
Explanation
Answer: A - Pulmonary edema is a condition that involves increased blood pressure in the blood vessels of the lungs forcing fluid into the air sacs; this prevents the absorption of oxygen.
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