Why can liver glycogen, but not muscle glycogen, be used to raise blood sugar levels?

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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**Why can liver glycogen, but not muscle glycogen, be used to raise blood sugar levels?**

In this educational discussion, we explore the physiological differences between liver glycogen and muscle glycogen and their roles in blood sugar regulation.

- **Liver Glycogen**: The liver stores glycogen primarily for the purpose of maintaining blood glucose levels. It can break down glycogen into glucose and release it into the bloodstream, providing energy for other tissues.

- **Muscle Glycogen**: Muscle glycogen is reserved for local energy needs during muscular activity. Muscle cells lack the enzyme glucose-6-phosphatase, which is necessary to release glucose into the bloodstream. Therefore, muscle glycogen is not used to regulate blood sugar.

Understanding these differences is crucial for comprehending how the body manages energy resources effectively.
Transcribed Image Text:**Why can liver glycogen, but not muscle glycogen, be used to raise blood sugar levels?** In this educational discussion, we explore the physiological differences between liver glycogen and muscle glycogen and their roles in blood sugar regulation. - **Liver Glycogen**: The liver stores glycogen primarily for the purpose of maintaining blood glucose levels. It can break down glycogen into glucose and release it into the bloodstream, providing energy for other tissues. - **Muscle Glycogen**: Muscle glycogen is reserved for local energy needs during muscular activity. Muscle cells lack the enzyme glucose-6-phosphatase, which is necessary to release glucose into the bloodstream. Therefore, muscle glycogen is not used to regulate blood sugar. Understanding these differences is crucial for comprehending how the body manages energy resources effectively.
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