Medicine General bef81ad8 Which parameter is almost same at apex and base of lung: March 2013 A pCO2 B O2 concentration in blood C Ventilation D Perfusion High-Yield Explanation Ans. B i.e. O2 concentration in blood At apex the O2 concentration is 20 ml/ 100 ml and at base the value is 19.2 ml/ 100 ml