HUMAN NUTRITION

Detailed explanation-1: -Glycogen is a form of glucose, a main source of energy that your body stores primarily in your liver and muscles. Your body needs carbohydrates from the food you eat to form glucose and glycogen.

Detailed explanation-2: -Carbohydrates are stored in the liver and skeletal muscles in the form of B) glycogen. Glycogen is a branched polysaccharide and is the main glucose storage molecule in animals.

Detailed explanation-3: -During intense, intermittent exercise and throughout prolonged physical activity, muscle glycogen particles are broken down, freeing glucose molecules that muscle cells then oxidize through anaerobic and aerobic processes to produce the adenosine triphosphate (ATP) molecules required for muscle contraction.

Detailed explanation-4: -When glucose enters the muscle cell at rest or during exercise, it is immediately phosphorylated to glucose-6-phosphate by the enzyme hexokinase. Glucose-6-phosphate can then be oxidized through glycolysis and the Krebs cycle to produce ATP for immediate use by the cell, or it can be stored as glycogen.