As the intensity of exercise increases (and the potential gap between energy demand and creation threatens to widen), the muscles quickly underwrite their escalating energy demands by augmenting oxidative with substrate-level phosphorylation, resulting in the increased generation of which of the following? As the intensity of exercise increases (and the potential gap between energy demand and creation threatens to widen), the muscles quickly underwrite their escalating energy demands by augmenting oxidative with substrate-level phosphorylation, resulting in the increased generation of which of the following? glucose water from the electron transport chain fatty acid lactic acid ATP