The lactic acid diffuses out of the muscles and is taken to the liver by the blood. The liver can change lactic acid back into glucose: however, this conversion also requires the use of ATP. During strenuous exercise, primarily the muscles and not the liver use the oxygen, so the lactic acid accumulates.
/quenchÂ·ing/ (kwenchÂ´ing) 1. suppressing or diminishing a physical property, as of heat in a metal by immersion in cold liquid. 2. decrease of fluorescence from an excited molecule by other molecules that absorb some emission energy that would otherwise occur as light.
to extinguish; put out: to quench fire with water; to overcome; subdue; suppress; to satisfy; slake: to quench one's thirst; to cool (hot steel, etc.) suddenly by plunging into water, oil, or the like; Origin of quench