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The question appears to be focused on understanding a biochemical pathway involving epinephrine and its effects on glycogen metabolism. It highlights the roles of various enzymes and processes, such as glycogen phosphorylase and glycogen synthase, as well as the impact of signaling molecules like cAMP.

Answer

Epinephrine stimulates glycogen breakdown and inhibits glycogen synthesis.

The diagram illustrates how epinephrine stimulates glycogen breakdown by activating glycogen phosphorylase and inhibits glycogen synthesis by inactivating glycogen synthase.

Answer for screen readers

The diagram illustrates how epinephrine stimulates glycogen breakdown by activating glycogen phosphorylase and inhibits glycogen synthesis by inactivating glycogen synthase.

More Information

Epinephrine activates the cAMP-PKA pathway, leading to the activation of phosphorylase kinase and glycogen phosphorylase while inactivating glycogen synthase. This process maximizes glucose availability during stress or energy-demanding situations.

Tips

A common mistake is confusing the roles of activated glycogen phosphorylase with inactive glycogen synthase in glycogen metabolism.

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