Question 1

Which of the following best describes the primary function of bile produced by the liver?

Accepted Answer

Bile emulsifies fats in the small intestine, increasing their surface area for enzyme action.

Question 2

A patient with pernicious anemia is unable to absorb vitamin B$$_{12}$$ efficiently. Which gastric secretion is most likely deficient in this patient?

Accepted Answer

Intrinsic factor

Question 3

Which structural modification of the small intestine is primarily responsible for increasing the surface area for nutrient absorption?

Accepted Answer

Villi

Question 4

Which of the following statements about carbohydrate metabolism is correct?

Accepted Answer

Glucose is the major breakdown product of carbohydrate digestion and is used to produce ATP.

Question 5

Which of the following is NOT an accessory digestive organ?

Accepted Answer

Small intestine

Question 6

A patient has a blockage in the common bile duct. Which digestive process will be most affected?

Accepted Answer

Emulsification and digestion of fats

Question 7

Which of the following correctly matches the enzyme with its substrate and site of action?

Accepted Answer

Pepsin—proteins—stomach

Question 8

Which process is responsible for moving nutrients from the lumen of the digestive tract into the bloodstream?

Accepted Answer

Absorption

Question 9

Which hormone stimulates the release of pancreatic juice and bile into the small intestine?

Accepted Answer

Cholecystokinin (CCK)

Question 10

Which of the following is absorbed by diffusion rather than active transport in the small intestine?

Accepted Answer

Lipids

Question 11

Which of the following is a function of the liver related to metabolism?

Accepted Answer

Detoxification of drugs and alcohol

Question 12

Which of the following best describes the role of LDLs in cholesterol transport?

Accepted Answer

LDLs transport cholesterol to body cells, contributing to atherosclerosis.

Question 13

Which of the following is the correct energy yield per gram for fats, carbohydrates, and proteins?

Accepted Answer

Fats: 9 kcal/g, Carbohydrates: 4 kcal/g, Proteins: 4 kcal/g

Question 14

Which of the following is TRUE regarding the absorption of nutrients in the small intestine?

Accepted Answer

Lipids are absorbed by diffusion, while most other nutrients are absorbed by active transport.

Question 15

A patient with liver failure is unable to efficiently detoxify ammonia. What compound will accumulate in the blood as a result?

Accepted Answer

Ammonia

Question 16

Which of the following is a correct sequence of the layers of the alimentary canal wall from innermost to outermost?

Accepted Answer

Mucosa, submucosa, muscularis externa, serosa

Question 17

Which of the following is the main site for absorption of water, vitamins, and ions in the digestive tract?

Accepted Answer

Large intestine

Question 18

Which of the following is a complete protein source containing all essential amino acids?

Accepted Answer

Eggs

Question 19

Which of the following processes is classified as catabolism?

Accepted Answer

Breakdown of triglycerides into fatty acids and glycerol

Question 20

Which of the following is TRUE regarding the role of the pancreas in digestion?

Accepted Answer

The pancreas secretes alkaline fluid and enzymes into the duodenum to digest all categories of food.

Chapter 14: The Digestive System and Body Metabolism – Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards