GLUCOSE METABOLISM

Question 1

What is glucose?

Answer 1

6 carbon molecule and serves as an efficient fuel source

Question 2

What is glucose broken down in to?

Answer 2

Carbon dioxide and water an then metabolized in the presence of oxygen

Question 3

What systems solely rely on glucose as their source of fuel?

Answer 3

Brain and nervous system
- other tissues organ systems can use other non carb fuel (fatty acids and ketones)

Question 4

Can the brain synthesize or store glucose?

Answer 4

NO
- cannot store more than a few minutes worth of glucose supply

Question 5

Fasting blood glucose is tightly regulated between what mmol/L?

Answer 5

4.4-5.0

Question 6

Insulin is secreted by what? And where?

Answer 6

Beta cells. In pancreas in response to rising blood glucose

Question 7

After a meal, 2/3 of glucose is stored where? And as what?

Answer 7

Liver. Glycogen

Question 8

How does the liver release glucose?

Answer 8

By breaking down glycogen in a process called glycogenolysis to maintain normoglycemia

Question 9

Once liver and skeletal muscles saturated with glycogen, what happens to the extra glucose?

Answer 9

Converted into fatty acids by the liver - stored as triglycerides in adipose tissue (tat)

Question 10

What is the process of gluconeogenesis?

Answer 10

Liver synthesizes glucose from non carb sources