<prompt> Under resting conditions, total body oxygen consumption is:100 ml. min.150 ml.min.200 ml.min250 ml.min.  <response>: Every 100 mL of aerial blood carries approx. 20 mL of oxygen. Of this 20 mL, tissues extract and utilize 5 mL, under resting conditions of metabolism. Considering the normal cardiac output under resting conditions to be 5 Lmin, 250 mL of oxygen will be extracted by the entire body. 5 mL from every 100 mL of blood; 250 mL from 5 L of blood. 