18 Questions
What is the normal fasting blood glucose level?
Between 70 to less than 100 mg/dL
Which hormone decreases the activity of key enzymes in gluconeogenesis?
Insulin
What happens to blood glucose level after a carbohydrate meal?
It increases
During fasting for less than 18 hours, which source contributes to blood glucose?
Glycogenolysis
Which hormones increase the activity of key enzymes in gluconeogenesis?
Glucagon
How is the blood glucose level regulated after a carbohydrate meal?
Increases due to insulin secretion
What inhibits glycogen phosphorylase?
Insulin
What acts as an allosteric activator of the inactive dephosphorylated form of glycogen phosphorylase in muscles?
AMP
Which molecule acts as an allosteric inhibitor for the active phosphorylase?
Glucose 6-P
In gluconeogenesis, what is a direct precursor for glucose synthesis?
Lactate
Which hormone stimulates glycogen phosphorylase in the liver?
Glucagon
What is the main source of blood glucose, especially after 18 hours of fasting?
Glucogenic amino acids
Which of the following statements about glycogen is correct?
Glycogen is a highly branched polymer of D-glucose.
Which of the following is true about glycogenesis?
The key enzyme of glycogenesis is glycogen synthase.
Which of the following statements about the regulation of glycogen synthesis is correct?
Glucose-6-phosphate inhibits inactive glycogen synthase.
What is the definition of glycogenolysis?
The breakdown of glycogen to glucose-1-phosphate.
Which enzyme is the key enzyme of glycogenolysis?
Glycogen phosphorylase
What is the primary role of liver glycogen?
To maintain blood glucose between meals.
Learn about the structure and function of glycogen, the main storage form of carbohydrates in animals. Understand how glycogen is stored in the liver and muscles to maintain blood glucose levels and provide energy to muscles during exercise.
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