17 Questions
Where does the hydrolysis of fats by lipase occur?
Small intestine
What are fatty acids and monoglycerides recombined into after absorption by epithelial cells?
Chylomicrons
Where are chylomicrons first transported into after exiting the intestine?
Lacteals
Which cell organelle is involved in forming water-soluble globules called chylomicrons?
Golgi apparatus
What is the primary site for the detoxification of many organic molecules, including drugs?
Liver
Which vessel is at the core of each villus and transports chylomicrons from epithelial cells?
Lacteal
Which type of nutrient absorption occurs in the lymph or bloodstream as monomers?
Monomers
Which enzyme has high activity in an acidic environment?
Pepsin
How does the absorption process of fats differ from that of carbohydrates?
Most absorbed fat first enters the lymphatic system, whereas carbohydrates directly enter the blood.
Which nutritional monomer can be transported in the blood after a typical meal?
Fatty acid
In which part of the vasculature does the glucose concentration vary the most for a nondiabetic person?
Hepatic portal vessel
Why do the folds, villi, and microvilli of the small intestine have a large surface area?
To increase the absorption of nutrients
How does fructose move from the lumen of the small intestine into the epithelial cells?
Facilitated diffusion down its concentration gradient
Which nutrients are pumped against concentration gradients by the epithelial cells of the villus for absorption?
Amino acids, small peptides, vitamins, and glucose molecules
Where does fructose go after it is absorbed into the epithelial cells of the villus?
Exits the basal surface and is absorbed into capillaries
What role does the hepatic portal vein play in nutrient absorption?
Carries nutrient-rich blood away from the villi to the liver
Which process allows much more absorption of nutrients than passive diffusion alone in the small intestine?
Active transport by epithelial cells
Test your knowledge on digestion and enzymes in this biology quiz. Questions cover topics such as the absorption of nutrients, enzyme activity in different environments, and the differences between fats and carbohydrates absorption.
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