One indication of the relative importance of various ATP-producing pathways is the max of certain enzymes of these pathways. The table shows the max values of several enzymes from the pectoral muscles (chest muscles used for flying) of pigeon and pheasant.
Vmax (μmol substrate/min/g tissue)
Enzyme Pigeon Pheasant
hexokinase 3.0 2.3
glycogen phosphorylase 18.0 120.0
phosphofructokinase‑1 24.0 143.0
citrate synthase 100.0 15.0
triacylglycerol lipase 0.070 0.01
Using the values in the table, classify each characteristic as describing either the pigeon or the pheasant.
-lower oxygen consumption
-long-distance flyer
-oxidative catabolism of fats
-anerobic glycolysis of glycogen
