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Monday, December 15, 2008

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 27th Edition Pages 142 & 162
QTDF
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Repeat
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

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