Small intestine and food absorption

How long is the human digestive system approximately?

• 7 meters

• 11 meters

• 5 meters

• 9 meters

What is the primary function of the villi in the small intestine?

• To store nutrients

• To produce digestive enzymes

• To increase surface area for absorption

• To break down food

Which of the following is absorbed into the lacteals of the villi?

• Sugars

• Proteins

• Fatty acids and glycerol

• Amino acids

What process allows small molecules to move from the small intestine into the bloodstream?

• Osmosis

• Filtration

• Active transport

• Diffusion

Why do large molecules need to be broken down in the digestive system?

• To make them taste better

• To store them more easily

• To increase their nutritional value

• To fit through the small intestine's holes