The answer is A
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-Kreb's cycle is the second phase of cellular respiration, with glycolysis as the first phase and electron transport chain as the last phase.
-Glycolysis is the breakdowns of carbohydrates-either glycogen stored in the muscle and in the liver or glucose delivered in the blood-to resynthesize ATP. Pyruvate is the end result of glycolysis, may proceed in one of two directions; pyruvate can be converted to lactate and can also be shuttled into the mitochondria.
-When pyruvate is converted into lactate, ATP resynthesis is slower and it depends on the intensity and duration of motor activity. This process is called anaerobic glycolysis. When pyruvate is transferred into mitochondria to enter the Krebs Cycle, the speed of ATP resynthesis is slower but it can last for longer time if the intensity of exercise is medium. This process is often referred to as aerobic glycolysis.
B. the electron transport chain
Electron transport chain is the final step of aerobic cellular respiration that produces a large number of ATPs by using the energy of proton motive force as generated during oxidation of NADH and FADH2.
Sprint needs a high amount of energy and muscles of athletes are conditioned to carry out aerobic cellular respiration during sprints to avoid any lactic acid accumulation due to fermentation.
i just took the quiz it is the electron B) Transport Chain
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The answer is B
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The most appropriate answer should be fermentation.
Sprint refers to the high-intensity exercise in which an athlete runs at his or her full speed for a short period of time.
Due to high intensity, the oxygen level decreases in the muscles and they undergo lactic acid fermentation.
It results in the depletion of glycogen reserve in the muscles as glucose is being used in the fermentation in order to provide energy.
Due to the build of lactic acid in the muscle, the athlete would feel burning effect and cramps in the muscles.
It decreases the performance of the athlete after sometimes.