Question

When you have a fasting blood test, which pathway is responsible for maintaining glucose stores?

	a.	Glycolysis
	b.	Citric Acid Cycle
	c.	Pentose Phosphate Pathway
	d.	Gluconeogenesis
	e.	Liver Metabolism

Answer 1

Liver metabolism

Whenever we are fasting, then the blood glucose level dropdown. This is restored back to the normal level by liver metabolism. Liver is the site of glycogenolysis. Glycogen molecules are broken down to produce glucose molecules which are there released into blood.

Glycolysis is the process of breakdown of glucose into pyruvic acid. Citric acid cycle is The breakdown of acetyl coenzyme a into carbon dioxide and water. Pentose phosphate pathway is also a catabolic pathway for glucose. All these three processes are responsible for reducing the Glucose level in blood.

Gluconeogenesis is the process of formation of new glucose molecules inside the cell. This will also increase blood glucose level but will not function during fasting.

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