Determine whether the given conditions promote entry into oxidative metabolism or limit entry into oxidative metabolism. These abbreviations may be used: is pyruvate dehydrogenase; is pyruvate dehydrogenase kinase; is pyruva dehydrogenase phosphatase. PDH PDK PDP Oxidative metabolism increases Oxidative metabolism is limited high O levels, active 2 PDH low O levels, inactive 2 PDH high O levels, inhibitor present 2 PDK high O levels, active 2 PDK low O levels, active 2 PDK