The problems of the flight environment

The principal problems derive from

Low cabin pressure and the effect that this has on the partial pressure of oxygen

The changes in cabin pressure which occur during the climb and, more particularly, the descent

Fear of flying

Question

From your recollections of the course on Aviation Medicine, Physiology and Human Factors, calculate the partial pressure of oxygen if the cabin pressure is 700mb.  

Select your answer from these...

  621mb   543mb   198mb   147mb   141mb   103mb