Kinesiology 2230A/B Lecture Notes - Lecture 10: Anaerobic Respiration, Cellular Respiration, Skeletal Muscle
20 Apr 2016
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Lactate transporters that will move lactate from cytosol into mitochondria. In glycolytic pathway we require h+s to form lactate from pyruvate, now we are cleaving off h+s to give us pyruvate. Occurs in slow twitch fibers and fat twitch oxidative fibers. Since its taking time to increase, we still need energy to run this fast (anaerobic component, atp- Pcr, glycolysis: o2 deficit early in exercise. Reached steady state- all energy required to run that speed is coming from aerobic metabolism: over time of increasing, had to supplement energy for aerobic from anaerobic system ** At the end of exercise, you have epoc (excess post exercise oxygen consumption); ventilation remains elevatedo o2 consumption remains elevated and slowly decreases. 2 phases: fast (alactic)- 30 sec half life. In 30 seconds, you will replenish half of the pcr that was broken down (atp-pcr system replenishes aerobically, little change in lactate) For lactic acid to disappear, it might take a couple hours (lactate pyruvate)
