Cellular breathing
Cellular respiration consists of three phases. The first stage is glycolysis, and the term glycolysis means the division of sugar. The six carbon molecules are then split into two halves during this process. After dividing the six carbon molecules into two halves, it forms two three carbon molecules. The second stage is the citric acid cycle, and two molecules of pyruvic acid [the fuel still present after glycolysis] are not yet ready for the citric acid cycle.
In addition, pyruvate must be converted to a form that can be used in the citric acid cycle. Next, the citric acid cycle completes the energy extraction of the sugar by removing the acetate molecules. Then, acetic acid is added to a four-carbon molecule, which later forms a six-carbon product called citric acid. Then two Co2 molecules are occasionally discharged as waste. The third stage is electron transfer, and the strand is built into the inner membrane of the mitochondria. These chains pump hydrogen ions into the mitochondrial inner membrane. Pour causes ions to concentrate more on one side of the membrane than on the other. The result of cellular respiration is glycolysis and citric acid cycling by directly manufacturing them each contributing 2 ATP.
When our muscles work, they need to continue to supply ATP, which is produced by cellular respiration. Glycolysis does not require oxygen, but each glucose molecule produces two ATP molecules that decompose into pyruvate. Your cells must consume more glucose per second because each glucose molecule produces much less ATP under anaerobic conditions. This recycling of NAD cannot occur under anaerobic conditions because there is no O 2 accepting electrons.
In contrast, NADH treats electrons by adding them to pyruvate produced by glycolysis. Muscle burns are caused by lactic acid buildup in the muscles. Then Hill conducted a classic experiment and began to observe the production of lactic acid in muscles under anaerobic conditions. People who can't accumulate lactic acid get tired faster, which is contrary to your expectations.
In addition, the changing perspective of the role of lactic acid in muscle fatigue surveys an important point about the scientific process: it is dynamic and constantly adjusted as new evidence emerges. Our muscles do not work long enough through lactic acid fermentation. However, the two ATP molecules produced by each glucose molecule during fermentation are sufficient to sustain many microorganisms.
Orignal From: Biology: Cell Breathing
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