Question

Which is true about high altitude pulmonary edema?

A. Pulmonary edema occurs at high altitude when pulmonary arterioles undergo vasoconstriction in response to low oxygen levels in alveoli, causing increased colloid pressure in the pulmonary capillaries.

B. Pulmonary edema occurs at high altitude when pulmonary arterioles undergo vasoconstriction in response to low oxygen levels in alveoli, causing increased hydrostatic pressure in the pulmonary capillaries.

C. Pulmonary edema occurs at high altitude when pulmonary arterioles undergo vasoconstriction in response to high carbon dioxide levels in alveoli, causing increased hydrostatic pressure in the pulmonary capillaries.

Answer 1

Pulmonary edema occurs at high altitude when pulmonary arterioles undergo vasoconstruction in response to low oxygen levels in alveoli, cusing increased hydrostatic pressure in the capilaries is the true statement about high altitude pulmonary edema. In high altitude places the oxygen concentration is low and at alveolar site the oxygen availability is less and lead to decreased oxygen concentration at alveoli. It lead to vasoconstruction of pulmonary arterioles. This lead to increased hydrostatic pressure in the pulmonary capillaries and leaking of capillaries occur. It causes high altitude pilmonary edema