Question

Animals do not produce alcohol in the presence of oxygen. Instead they produce lactic acid. Describe the effects of lactic acid on animals.

Answer 1

Yes, Animals do not produce alcohol in the presence of oxygen.Because alcoholic Fermentation is an anaerobic (non-oxygen-requiring) pathway for breaking down of glucose.yeasts perform this conversion in the absence of oxygen.so alcohol does not produce in the presence of oxygen.

animals are produce lactic acid instead of alcohol in the presence of oxygen the effects of lactic acid on animals -

The oxygen supply to the muscle in living vertebrate body under normal conditions is so efficient that it refrains lactic acid to accumulate. but during heavy exercise, the oxygen supply become inadequate, and excess of lactic acid accumulates in the muscle fibres and diffuses out into blood stream. the reaasons behind this , is the formation of NADH by glycolysis exceeds the ability of the respiratory chain to oxidise it back to NAD+. the pyruvate produced by glycolysis in muscle is then converted to lactate by lactate dehydrogenase (LDH). a considerable amonut of blood lactate is utilised by the heart and small amount by other tissues.but the major part of the blood lactate is taken up by the liver and is converted into glucose by gluconeogenesis. this glucose is realesed back into blood stream and skeletal muscle and brain, in the muscle glucose is converted into glycogen by glycogenesis and thus muscle gain back its depleted glycogen store. liver and muscle help each other to organise a bigger cycle through which lactic acid moves. this cycle is as follows : muscle glycogen to muscle lactic acid to blood lactate to liver glucose is formation to blood glucose to muscle glycogen. this cycle is also called cori cycle.