Biology Quiz on Absorption and Villi

What is the process called when molecules move from an area of high concentration to an area of low concentration?

• Osmosis

• Diffusion

• Active Transport

• Facilitated Diffusion

Which of the following is primarily absorbed into the lacteal?

• Water

• Sugars

• Amino Acids

• Fatty Acids and Glycerol

Where does absorption mainly take place in the human body?

• Esophagus

• Small Intestine

• Stomach

• Large Intestine

What is the role of goblet cells in the villi?

• Transport nutrients

• Secrete mucus to aid digestion

• Produce enzymes

• Absorb water

Which of the following is NOT a method of nutrient absorption in the small intestine?

• Passive Diffusion

• Endocytosis

• Facilitated Diffusion

• Active Transport

What is the function of the dense capillary network in the villi?

• To secrete digestive enzymes

• To block fatty molecules

• To increase transport of digested products

• To slow down food movement

How are amino acids and most sugars transported into the bloodstream?

• By simple diffusion

• By endocytosis

• By osmosis

• By active transport

What adaptation of the ileum increases its surface area for absorption?

• Dense capillary network

• Thick epithelial cells

• Narrow lumen

• Presence of microvilli

Why is the epithelial cell in the villi one cell thick?

• To block fatty molecules

• To secrete mucus

• To slow down food movement

• To allow for efficient transport

Which vitamins are transported into the lacteal via simple diffusion?

• Vitamin A, D, E, and K

• Vitamin B and C

• Vitamin B12

• Vitamin K and C