A patient has low blood sugar. The enzyme assay for Glycogen phosphorylase demon

Question

A patient has low blood sugar. The enzyme assay for Glycogen phosphorylase demonstrates it is below the normal range. What test did the doctor order? a) Blood Gas Assay b) A1C c) Cholesterol d) Liver Enzymes e) None of the above A patient has low blood sugar. The enzyme assay for Glycogen phosphorylase demonstrates it is below the normal range. What test did the doctor order? a) Blood Gas Assay b) A1C c) Cholesterol d) Liver Enzymes e) None of the above A patient has low blood sugar. The enzyme assay for Glycogen phosphorylase demonstrates it is below the normal range. What test did the doctor order? a) Blood Gas Assay b) A1C c) Cholesterol d) Liver Enzymes e) None of the above

Explanation / Answer

Glycogen phosphorylase is an enzyme that controls the critical step in the conversion of glycogen to glucose. Insulin inhibits this enzyme whereas glucagon stimulates this enzyme. So, when glycogen phosphorylase is low, the test that the doctor ordered is A1C. (option b).

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