Lactose Intolerance Video

Front

What two monosaccharides are formed when the lactase enzyme hydrolyzes lactose?

Back

Glucose and Galactose.

Front

What is the role of the lactase enzyme in lactose digestion?

Back

Lactase hydrolyzes lactose into glucose and galactose, allowing for absorption in the small intestine.

Front

What is lactose intolerance?

Back

Lactose intolerance is the inability to digest lactose due to insufficient lactase enzyme production.

Front

Where is the lactase enzyme produced in the human body?

Back

The lactase enzyme is produced in the small intestine.

Front

What genetic mutation is associated with lactase persistence?

Back

A mutation in the genetic switch for the lactase gene allows for continued production of lactase into adulthood.

Front

How does natural selection relate to lactase persistence?

Back

Natural selection favored individuals with lactase persistence in pastoralist cultures that consumed milk.

Front

What evidence supports the evolution of lactase persistence?

Back

Ancient pots used to hold milk are dated around the same time as lactase-persistence mutations.

Front

What happens to blood glucose levels in lactose-tolerant individuals after consuming milk?

Back

Blood glucose levels rise due to the digestion of lactose into glucose.

Front

What is the difference between lactose intolerance and lactase persistence?

Back

Lactose intolerance is the inability to digest lactose, while lactase persistence is the continued production of lactase into adulthood.

Front

What is the significance of the lactase gene in human evolution?

Back

The lactase gene illustrates how human evolution can be influenced by dietary practices.