The Respiratory System

at a Glance

Jeremy Ward, Jane Ward and Richard Leach

Multiple Choice: Chapter 16 Exercise, altitude and diving

Question 16.1.In exercise, as the workload increases progressively

a the oxygen extraction increases progressively until at maximum exercise all the oxygen has been removed from the venous blood
b arterial Pco2 is little changed in mild to moderate exercise but falls in heavy exercise
c alveolar ventilation approximately doubles when the carbon dioxide production has risen fourfold
d the main determinant of the maximum oxygen uptake that a person can achieve is his/her maximum ventilation.