The oxidation of C3H8 has been broken out into eight semidetailed steps in Turns (P.1 through P7 and others). Following the example of C3H8 , show the first five steps in the oxidation of butane, C4H10.

It is false that during exercise, the oxygen concentration in the blood increases to twice that of resting levels. As a matter of fact, the oxygen either stays the same or decreases, or it may increase slightly than it used to be when the person was resting, but it definitely does not double while exercising. Hope this helps. Let me know if you need additional help!