What energy source do animals store in their livers?

Glycogen is an important fuel reserve for several reasons. It serves as a buffer to maintain blood-glucose levels, and glucose is virtually the only fuel used by the brain, except during prolonged starvation. The glucose from glycogen also is readily mobilized and is therefore a good source of energy for sudden, strenuous activity.

Asked by Pamela Ferdinand · Last updated 5 years ago · 370.5K views