Understanding Lactose Intolerance II

What is lactose composed of?

• Two glucose molecules

• Glucose and galactose

• Glucose and fructose

• Two galactose molecules

Which enzyme is necessary for the digestion of lactose?

• Amylase

• Lactase

• Sucrase

• Maltase

What is the primary symptom of lactose intolerance?

• Fever

• Gas and diarrhea

• Headache

• Rash

What percentage of American blacks were found to be lactose intolerant in the study?

• 6 to 15 percent

• 20 percent

• 70 percent

• 80 percent

Explain why measuring blood glucose levels is a preferred method for assessing lactose intolerance.

• It is less invasive than an intestinal biopsy.

• It provides a direct measure of lactose breakdown.

• False-negative results are rare.

• All of the above

Compare the lactose intolerance rates between the Tussi and Ganda tribes in Uganda.

• Both tribes have the same intolerance rate.

• The Tussi tribe has a higher intolerance rate.

• The Ganda tribe has a higher intolerance rate.

• Neither tribe is lactose intolerant.

Why might lactose intolerance vary among different ethnic groups?

• Genetic differences

• Dietary habits

• Environmental factors

• All of the above

Calculate the maximum dose of lactose a person weighing 60 kg should ingest for a lactose intolerance test.

• 60 grams

• 100 grams

• 120 grams

• 150 grams

Discuss the implications of lactose intolerance on dietary choices for individuals.

• They can consume any dairy product without concern.

• They need to avoid all dairy products.

• They may need to choose lactose-free alternatives.

• They should only consume dairy in the morning.

Design a simple experiment to test for lactose intolerance using blood glucose levels.

• Measure blood glucose before and after lactose ingestion.

• Only measure blood glucose after lactose ingestion.

• Measure blood glucose only before lactose ingestion.

• Do not measure blood glucose at all.