[Answer] Where is glycogen stored in the muscle cells?

Answer: in glycosomes
Where is glycogen stored in the muscle cells?

Glycogen is a multibranched polysaccharide of glucose that serves as a form of energy storage in animals fungi and bacteria. The polysaccharide structure represents the main storage form of glucose in the body. Glycogen functions as one of two forms of energy reserves glycogen being for short-term and the other form being triglyceride stores in adipose tissue (i.e. body fat) for long-term storage.

In humans glycogen is made and stored primarily in the cells of the liver and skeletal muscle. In the liver glycogen can make up 5–6% of the organ’s fresh weight and the liver of an adult weighing 1.5 kg can store roughly 100–120 grams of glycogen. In skeletal muscle glycogen is found in a low concentration (1–2% of the muscle mass) and the skelet…

In humans glycogen is made and stored primarily in the cells of the liver and skeletal muscle. In the liver glycogen can make up 5–6% of the organ’s fresh weight and the liver of an adult weighing 1.5 kg can store roughly 100–120 grams of glycogen. In skeletal muscle glycogen is found in a low concentration (1–2% of the muscle mass) and the skeletal muscle of an adult weighing 70 kg stores roughly 400 grams of glycogen. The amount of glycogen stored in the body—particularly within the muscles and liver—mostly depends on physical training basal metabolic rate and eating habits. Small amounts of glycogen are also found in other tissues and cells including the kidneys red blood cells white blood cells and glial cells in the brain. The uterus also stores glycogen during pregnancy to nourish the embryo. Approximately 4 grams of glucose are present in the blood of humans at all times; in fasting individuals blood glucose is maintained constant at this level at the expense of glycogen stores in the liver and skeletal muscle. Glycogen stores in skeletal muscle serve as a form of energy storage for the muscle itself; however the breakdown of muscle glycogen impedes muscle glucose uptake from the blood thereby increasing the amount of blood glucose available for use in other tissues. Liver glycogen stores serve as a store of glucose for use throughout the body particularly the central nervous system . The human brain consumes approximately 60% of blood glucose in fasted sedentary individuals. Glycogen is the analogue of starch a glucose polymer that functions as energy storage in plants . … Read more on Wikipedia

In myocytes (muscle cells) glycogen degradation serves to provide an immediate source of glucose-6-phosphate for glycolysis to provide energy for muscle contraction. In hepatocytes (liver cells) the main purpose of the breakdown of glycogen is for the release of glucose into the bloodstream for uptake by other cells…

Leave a Reply