Refer to Figure 22.6 and summarize the changes in liver glycogen and blood glucose during the st

step 1 explanation for the given question here the question is referred to figure 22 .6 and summarize t

Refer to Figure 22.6 and summarize the changes in liver...

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Key Concepts

Liver Glycogen Depletion

During the early stages of starvation, the liver’s glycogen stores are rapidly mobilized to maintain blood glucose levels. This breakdown process, known as glycogenolysis, is one of the body’s first responses to an energy deficit, leading to a significant decrease in liver glycogen content over time.

Blood Glucose Homeostasis

The body maintains blood glucose levels within a narrow range, even during starvation, through tightly regulated metabolic processes. Initially, glycogenolysis helps sustain glucose levels, but as glycogen stores deplete, other mechanisms such as gluconeogenesis are activated to produce new glucose from non-carbohydrate substrates, ensuring continuous energy supply for critical functions.

Gluconeogenesis

As starvation progresses and liver glycogen is exhausted, the body relies increasingly on gluconeogenesis, a metabolic pathway that synthesizes glucose from amino acids, lactate, and glycerol. This adaptation is essential for sustaining blood glucose levels, especially for tissues that depend predominantly on glucose, such as the brain.

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