KP322 Chapter Notes - Chapter 4: Anaerobic Glycolysis, Oxidative Phosphorylation, Exercise Intensity
11 Dec 2017
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Resting blood lactate levels are steady and low e. g. 1. 0 mm/l. O2 (cid:272)o(cid:374)su(cid:373)ptio(cid:374) (cid:272)a(cid:374) (cid:271)e used to dete(cid:396)(cid:373)i(cid:374)e a (cid:858)(cid:271)aseli(cid:374)e(cid:859) e(cid:374)e(cid:396)g(cid:455) (cid:396)e(cid:395)ui(cid:396)e(cid:373)e(cid:374)t. Atp production needs to be able to start instantly when muscle contraction occurs. O2 consumption does not increase instantaneously, therefore anaerobic production of atp is used at the beginning of exercise. Atp-pc glycolysis aerobic energy production. Atp pc and glycolysis provide atp for first few minutes until steady state is reached than anaerobic energy production commences. Oxygen deficit: applies to the lag in oxygen uptake at the beginning of exercise. Because aerobic system is not fully activated at the onset of exercise: due to inadequate oxygen delivery to the muscle or, delay because the stimuli for oxidative phosphorylation require some time, adp and pi are the stimuli. Trained adults reach steady state faster: aerobic atp production starts quicker resulting in less production of lactate and h+ in a trained individual.
