Question

why is glucose-6-phosphatase not present in muscle?

Answer 1

Carbohydrate Metabolism
Thus, glucose 6-phosphate generated from glycogenolysis and glucogenesis is released from the liver into the circulation for peripheral use. There does not appear to be glucose 6-phosphatase in skeletal muscle; hence, muscle glycogen is not a source of circulating glucose.
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Answer 2

Answer:

Carbohydrate Metabolism

Thus,glucose-6- phosphatase generated from glycogenolysis is released from a liver into the circulation for peripheral use. There does not appear to be glucose-6-phosphatase in skeletal muscle.

Hence, muscles glycogen is not a source of circulating glucose.