Lactase Fact or Fiction Student PDF

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STUDENT HANDOUT !

LACTOSE INTOLERANCE: FACT OR FICTION? INTRODUCTION !

You may know someone who is lactose intolerant—but do you really know what that means? This worksheet will test your knowledge by having you evaluate several statements about lactose intolerance. ! PROCEDURE !

Read the statements in the table below, before watching the film Got Lactase? The Co-evolution of Genes and Culture. Discuss each statement with a partner and decide whether the statement is true or false. Then, in the column labeled “Before,” circle T for any statement you believe to be true and F for any statement you believe to be false. After watching the film, discuss the statements with your partner again and circle either T or F in the column labeled “After.” ! ! Before

After

Statement

T/F

T/F

1. Baby mammals depend on milk to survive.

T/F

T/F

2. Milk is a healthy f ood for an adult cat.

T/F

T/F

3. Throughout human history, people have always consumed the milk of other animals.

T/F

T/F

4. Lactose is a sugar in milk.

T/F

T/F

5. Most human adults around the world can digest the lactose in milk; a minority of people cannot digest lactose.

T/F

T/F

6. Digesting lactose causes a person’s blood glucose levels to increase.

T/F

T/F

7. Lactose intolerance is an allergy to milk and milk products.

T/F

T/F

8. Lactose intolerance is a genetic trait.

!

!

After completing the table, write one or two sente nces to e xplain your answer to each statement. Include any evidence from the film that supports yo ur answer. If your answer changed after watching the film, explain why it changed.

Updated March 2015 www.BioInteractive.org

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Got L acta actass e? Co-- evolution of G enes and Culture The Co

TEACHER MATERIALS

ANSWERS !

1. Baby mammals depend on mi lk to survive.

This is one of the key things that separate mammals from other types of animals. _____________________________________________________________________________________________________________________________________ __________________________________________________________________________________________ 2. Milk is a healthy f ood for an adult cat.

It is shown that all animals besides us dont have lactouse percistence _______________________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________________________!

3. Throughout human history, people have always consumed the milk of other animals.

It was shown in the film that people from many places were drinking milk even 9000 years ago. _______________________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________________________!

4. Lactose is a sugar in milk.

This is 1) said in the film and 2) the ose at the end indicates the fact that lactose is a sugar _______________________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________________________!

5. Most human adults around the world can digest the lactose in milk; a minority of people cannot digest lactose.

This is actually the other way around, it is relatively rare that people can digest milk. _______________________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________________________!

6. Digesting lactose causes a person’s blood glucose levels to increase.

This happens because the enzyme that helps with digesting lactose turns it into glucose. _______________________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________________________!

7. Lactose intolerance is an allergy to milk and milk products.

It is not much of an allergy but more of a mutation in the human body for people to be able to consume milk. _______________________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________________________!

8. Lactose intolerance is a genetic trait.

It was a genetic mutation that was passed down due to the fact that drinking milk was for survival and _______________________________________________________________________________________________________________________________________ were intolerant, you would die due to diarrhea. _______________________________________________________________________________________________________________________________________!

Lactose Intolerance: Fact or Fiction www.biointeractive.org

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