Glycogen is stored in which tissues?

Glycogen is stored in which tissues?

• A. Liver and muscles
• B. Brain
• C. Heart
• D. Skin

Answer: (A)

Glycogen is the stored form of glucose in animals, and its main storage sites are the liver and skeletal muscles. In the liver, glycogen acts as a glucose buffer, releasing glucose into the bloodstream between meals to maintain blood sugar levels for tissues like the brain. In muscle, glycogen provides a rapid local energy source for contraction during exercise and isn’t released into the bloodstream because muscle lacks the enzyme to export glucose. The brain relies on circulating glucose rather than storing glycogen, and while the heart uses glycogen for energy, it is not a primary storage site; skin does not store glycogen. So the tissues where glycogen is stored are the liver and muscles.

Glycogen is the stored form of glucose in animals, and its main storage sites are the liver and skeletal muscles. In the liver, glycogen acts as a glucose buffer, releasing glucose into the bloodstream between meals to maintain blood sugar levels for tissues like the brain. In muscle, glycogen provides a rapid local energy source for contraction during exercise and isn’t released into the bloodstream because muscle lacks the enzyme to export glucose. The brain relies on circulating glucose rather than storing glycogen, and while the heart uses glycogen for energy, it is not a primary storage site; skin does not store glycogen. So the tissues where glycogen is stored are the liver and muscles.