As what are carbohydrates stored in the body?

Carbohydrates are primarily stored in the body as glycogen in the liver and muscles. Glycogen serves as a readily available energy source that the body can mobilize during periods of increased energy demand, such as during intense exercise. When carbohydrates are consumed, they are converted into glucose, which can be used immediately for energy or can be stored as glycogen for future use.

The liver plays a crucial role in maintaining blood glucose levels by releasing glycogen when needed, while muscle glycogen is generally used locally to fuel muscle activity during exercise. This storage mechanism is vital for athletes or anyone engaging in regular physical activity, as it helps sustain energy levels and performance.

The other choices represent different components of metabolism. Glucose in the blood is a form of energy but is not a storage form. Fatty acids in tissues refer to the storage of fats rather than carbohydrates. Amino acids in cells serve various functions in protein synthesis and other metabolic processes, rather than acting as a storage form for carbohydrates. Thus, glycogen is the correct answer for the storage form of carbohydrates in the body.