Question

The lactic acid generated during muscle contraction is converted to glycogen in:
A. Muscle
B. Kidney
C. Pancreas
D. Liver

Answer 1

Hint: Usually, the body breaks down carbohydrates which yields glucose to be able to fulfil the energy required process (Aerobic pathway). The breakdown of glucose yields 38 ATPmolecules. But in conditions when the oxygen level is low, carbohydrates are broken down to form lactic acid (Anaerobic pathway). Breakdown of lactic acid yields 2 molecules of ATP.

Complete Step by Step Answer:
Lactic acid is produced in muscles, liver, blood cells through anaerobic glycolysis or fermentation. It is converted into glycogen by a process called gluconeogenesis. It occurs as a part of a process called Cori’s cycle. The main steps for gluconeogenesis are:
1. The acid is transported by the blood to the liver.
2. It is converted into glucose.
3. It is then converted into glycogen.
All these processes require oxygen. Therefore, a person takes time to breathe at a normal rate after a period of heavy exercising. The amount of oxygen required to fulfil these processes is called oxygen debt.

Thus, the correct answer is D: Liver

Note: It is the lactic acid produced while exercising that makes one feel sore. It is because the muscles’ own blood vessels are used which deprives them of oxygen rich blood.
Since buildup of lactic acid can perturb the levels of ph in the body, it is potent to convert it into an insoluble form.
Gluconeogenesis refers to the conversion of any non-carbohydrate substance be it amino acids/ lactic acid to glycogen.