Question

Under normal conditions, humans break down glucose by aerobic respiration. however, there are times, such as during vigorous exercise, when muscle cells respire glucose faster than oxygen can be supplied. under these conditions (1) ____________________ fermentation occurs. in the process mentioned in (1), nadh produced during (2) ____________________ transfers its hydrogen atoms and associated electrons to (3) ____________________ in the cytoplasm of the cell.this regenerates ____________________ and allows (2) to continue. this results in the conversion of (3) to (4) ______________________________. the accumulation of (4) molecules in muscle tissues causes stiffness, soreness and fatigue. (4) is transported through the bloodstream from muscle cells to the liver. when the exercising is stopped, (4) is oxidized back to (3), which then goes through the ____________________ cycle and ________________________________________. the extra ____________________ needed to convert (4) to carbon dioxide and ____________________ is referred to as ____________________.

Answer 1

Humans experience lactic acid fermentation when their bodies urgently require a lot of energy.  When you are sprinting at full pace or exercising there is shortage of oxygen in the body and the ATP gets exhausted. Your muscles will begin manufacturing ATP through lactic acid fermentation once the reserve ATP has been expended.

Under normal conditions, humans break down glucose by aerobic respiration. however, there are times, such as during vigorous exercise, when muscle cells respire glucose faster than oxygen can be supplied. under these conditions (1) Lactic Acid fermentation occurs. in the process mentioned in (1), nadh produced during (2) Glycolysis transfers its hydrogen atoms and associated electrons to (3) Pyruvate in the cytoplasm of the cell.this regenerates NAD+ and allows (2) to continue. this results in the conversion of (3) to (4) Lactate. the accumulation of (4) molecules in muscle tissues causes stiffness, soreness and fatigue. (4) is transported through the bloodstream from muscle cells to the liver. when the exercising is stopped, (4) is oxidized back to (3), which then goes through the Citric acid cycle and store energy in the form of ATP. the extra Lactate needed to convert (4) to carbon dioxide and pyruvate is referred to as Cori cycle.

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