True statement regarding difference between apex and base of lung, in erect posture is:March 2012, March 2013

Ans: B i.e. V/ Q is high at the apex of lungV/ Q changes from region to region of the lung.Thus in apical zone in the erect posture, Q (perfusion) is very low and therefore V/ Q ratio is high. While at the bases, it (V/ Q) is low