<prompt> Hypoxemia seen in:HypoventilationMyasthenia gravisPulmonary emboliAll of the above  <response>: Answer is D All of the above: The four basic mechanisms of hypoxemia are a decrease in inspired P02 Decreased Fi02, hypoventilation as in Myaesthenia gravis, VQ mismatch as in pulmonary emboli and shunting. 