Question

Glycogenesis refer to
(a) Conversion of glycogen to glucose.
(b) Breakdown of glucose to form pyruvate.
(c) Breakdown of pyruvate to form glucose.
(d) Conversion of glucose to glycogen.

Answer 1

Hint: The liver is the most important vital organ in our body which controls many functions. Breakdown of carbohydrate, protein, and fat takes place in the liver which helps for the production of glucose.

Complete answer:
In glycogenesis, the liver cell converts excess glucose into glycogen with the help of insulin secreted by plasma. Glycogenesis takes place when a person is fasting and glycogen starts depleting, so to fulfill the demand of glycogen, glucose gets converted into glycogen.

Additional Information: The liver also performs a function as the production of bile, which is the main endocrine secretion of the liver containing bile pigment, bile salts, cholesterol, and phospholipid, bile salts help in the digestion of fat. The liver excretes out like urea which obtains ammonia and carbon dioxide, pigment bilirubin and biliverdin with other waste like cholesterol, metal ion, hemoglobin waste, etc. Hematopoiesis takes place in the liver where the formation of blood corpuscles takes place, hematopoiesis occurs in the liver at the embryo stage. It synthesizes blood proteins like prothrombin and fibrinogen. It also synthesizes vitamin A from carotene. It consists of Kuffer cells which engulf the disease-causing microbes and dead cells. Worn out RBC is broken down in the liver cell, by which hemoglobin changes into bile. It maintains body fluid by the production of angiotensinogen, it also maintains body temperature with the generation of heat through the metabolic process. The liver also secretes anticoagulant heparin which decreases the clotting ability of harmful clots in the blood vessel.
So, the correct answer is the ‘conversion of glucose into glycogen’.

Note: Glycogenolysis and glycogenolysis also take place in the liver. In glycogenolysis, glycogen gets converted into glucose, while in gluconeogenesis formation of glucose and glycogen takes place from the non-carbohydrate source. Glycogenesis and glycogenolysis take place in the liver but gluconeogenesis takes place in the liver as well in kidney and striped muscles.