14.05 - Digestive System Pt.3: Crash Course

Which enzyme is crucial for the digestion of lactose?

• Peptidase

• Lactase

• Lipase

• Amylase

What percentage of adult Britons and Scandinavians can digest lactose without issues?

• Less than 40%

• Approximately 50%

• More than 70%

• About 90%

Tags

NGSS.MS-LS3-1

What is the main consequence of lactose intolerance in the digestive system?

• Decreased stomach acid

• Enhanced nutrient absorption

• Gastric distress from gas and bloating

• Increased bile production

What is the primary function of the stomach in digestion?

• Mechanical digestion

• Absorbing nutrients

• Breaking down proteins

• Producing digestive enzymes

How long is the small intestine approximately?

• 10 meters

• 6 or 7 meters

• 3 meters

• 1 meter

What is the function of microvilli in the small intestine?

• To produce digestive enzymes

• To increase surface area for absorption

• To secrete bile

• To store undigested food

Which vitamins are primarily absorbed in the ileum?

• Vitamin C and D

• Vitamin A, B12, E, D, and K

• Vitamin B and C

• Vitamin E and K

What is the primary chemical activity in the duodenum?

• Chemical digestion

• Carbohydrate breakdown

• Fat emulsification

• Protein synthesis

Tags

NGSS.MS-LS1-7

What is the primary function of the pyloric sphincter?

• To control the passage of chyme from the stomach to the duodenum

• To absorb water

• To store enzymes

• To release bile

What is the main role of the liver in the digestive system?

• To produce enzymes

• To store vitamins

• To make bile

• To absorb nutrients