Muscle Glycogen in which part cannot contribute directly to Blood Glucose

Question 28

Glycogen in which part cannot contribute directly to Blood Glucose

a.       Liver

b.      Muscle

c.       Both

d.      None

Answer: 

b. Muscle

Reference:

Harper 27^th Edition Pages 142 & 162

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Discussion

Muscle Glycogen cannot contribute directly to Plasma Glucose since muscle lacks glucose-6-phosphatase

Explanation

Self Explanatory

Comments

The primary purpose of muscle glycogen is to provide a source of Glucose-6-phosphate for energy yielding metabolism in muscle itself.

Tips

The major metabolic pathways in Muscle are

·        Fast Twitch Muscle - Glycolysis

·        Slow Twitch Muscle – beta oxidation and TCA