the storage form of carbs in humans and animals is called __.
a. Glycogen
b. Starch
c. Cellulose
d. Fructose
The Correct Answer and Explanation is :
The correct answer is a. Glycogen.
Explanation:
Carbohydrates serve as a crucial energy source for humans and animals, and they can be stored in specific forms for later use. The primary storage form of carbohydrates in humans and animals is glycogen, a polysaccharide made up of glucose units linked together. Glycogen is primarily stored in the liver and muscle tissues, providing a readily available energy source that can be mobilized when needed.
Glycogen has a branched structure, which allows for rapid release of glucose when energy is required. During periods of intense physical activity or between meals, glycogen is broken down through a process called glycogenolysis. This process involves the enzymatic cleavage of glycogen into glucose molecules, which can then enter the bloodstream to be utilized by cells for energy. The liver’s glycogen stores help maintain blood glucose levels, while muscle glycogen is used locally to fuel muscle contractions.
In contrast to glycogen, starch is the primary storage form of carbohydrates in plants. Starch is also made up of glucose units but exists in a less branched form than glycogen. Cellulose, another carbohydrate, is a structural component of plant cell walls and is not digestible by humans. Fructose, on the other hand, is a simple sugar found in fruits and is not a storage form of carbohydrates.
The body regulates glycogen synthesis and breakdown based on dietary intake and energy expenditure, with insulin promoting glycogen synthesis and glucagon stimulating glycogenolysis. This dynamic regulation ensures that energy is available when needed, supporting various bodily functions and activities. Thus, glycogen plays a vital role in energy metabolism, ensuring that both humans and animals can maintain energy homeostasis effectively.