Question

Production of lactic acid at the end of respiration​

Answer 1

Answer:

Lactic acid, or lactate, is a chemical byproduct of anaerobic respiration — the process by which cells produce energy without oxygen around. Bacteria produce it in yogurt and our guts.  Lactic acid is also in our blood, where it's deposited by muscle and red blood cells.

It was long thought that lactic acid was the cause of muscle soreness during and after an intense period of exercise, but recent research suggests that's not true, said Michael Gleeson, an exercise biochemist at Loughborough University in the U.K., and author of "Eat, Move, Sleep, Repeat" (Meyer & Meyer Sport, 2020).  

"Lactate has always been thought of as the bad boy of exercise," Gleeson told Live Science.  

Contrary to that reputation, lactic acid is a constant, harmless presence in our bodies. While it does increase in concentration when we exercise hard, it returns to normal levels as soon as we're able to rest — and even gets recycled back into energy our body can use later on, Gleeson said.  

Explanation:

Lactic acid is an organic acid. It has a molecular formula CH₃CH(OH)COOH. It is white in the solid state and it is miscible with water. When in the dissolved state, it forms a colorless solution. Production includes both artificial synthesis as well as natural sources. Lactic acid is an alpha-hydroxy acid due to the presence of a hydroxyl group adjacent to the carboxyl group. It is used as a synthetic intermediate in many organic synthesis industries and in various biochemical industries. The conjugate base of lactic acid is called lactate.

Answer 2

Lactate reacts with oxidized nicotinamide adenine dinucleotide (NAD+) to form pyruvate, reduced nicotinamide adenine dinucleotide (NADH), and a proton (H+).