5 Why would measuring blood glucose levels in an individual

5. Why would measuring blood glucose levels in an individual, 20 to 30 minutes after they drink a liter of milk, indicate whether they are able to digest lactose.

a. When lactose is digested by lactase in the small intestine, different cells in the body start releasing glucose into the bloodstream.

b. When lactose is digested by lactase, the glucose that is produced enters the bloodstream from the small intestine. c. When lactose enters the large intestine, glucose is digested by bacteria and then enters the bloodstream.
d. The fats and proteins in milk are digested by the body, causing glucose levels in the blood to increase.

Solution

The correct answer is :When lactose is digested by lactase, the glucose that is produced enters the bloodstream from the small intestine.

Reason: The lactase enzyme in the small intestine breaks down lactose to glucose and galactose.Glucose is then absorbed through the small intestine\'s wall and passes into the blood stream and the blood glucose level increases.This confirms that we are able to digest lactose.If lactose were not digested by lactase in the small intestine, it would pass to the large intestine where it is fermented to produce hydrogen and no glucose.So blood glucose level will decrease.