$$ \text{BMR} = \text{Energy used at rest in a fasting state} $$

$$ \text{SMR} = \text{BMR} + \text{Energy used for activity} $$

Question 1

Which of the following best describes the function of the small intestine in the human digestive system?

Accepted Answer

It is the primary site for nutrient absorption due to its large surface area.

Question 2

Which accessory organ produces enzymes that are released into the small intestine to aid in the digestion of carbohydrates, proteins, and fats?

Accepted Answer

Pancreas

Question 3

What is the primary function of peristalsis in the digestive system?

Accepted Answer

To move food along the digestive tract through rhythmic muscle contractions

Question 4

Which of the following best explains why the small intestine has villi and microvilli?

Accepted Answer

To provide a larger surface area for nutrient absorption

Question 5

A patient has a deficiency in bile production. Which digestive process is most likely to be impaired?

Accepted Answer

Emulsification and digestion of fats

Question 6

Which equation best represents the calculation of Basal Metabolic Rate (BMR) for an adult?

Accepted Answer

$$ 	ext{BMR} = 	ext{Energy used at rest in a fasting state} $$

Question 7

Which of the following is NOT a function of the liver in the digestive system?

Accepted Answer

Absorption of nutrients

Question 8

During digestion, which enzyme is responsible for breaking down starches in the mouth?

Accepted Answer

Amylase

Question 9

Which structure is responsible for the mechanical breakdown of food and the initiation of protein digestion?

Accepted Answer

Stomach

Question 10

A person consumes a meal high in fat. Which accessory organ will be most active in aiding digestion, and what is its primary function?

Accepted Answer

Gallbladder; stores and releases bile to emulsify fats

Question 11

Which of the following best describes the purpose of 'My Plate' in nutrition education?

Accepted Answer

To provide a visual guide for balanced meal planning

Question 12

Which process is directly responsible for moving food from the esophagus to the stomach?

Accepted Answer

Peristalsis

Question 13

Which of the following statements about enzymes in digestion is correct?

Accepted Answer

Enzymes speed up chemical reactions that break down food molecules.

Question 14

Which equation best represents the difference between Standard Metabolic Rate (SMR) and Basal Metabolic Rate (BMR)?

Accepted Answer

$$ 	ext{SMR} = 	ext{BMR} + 	ext{Energy used for activity} $$

Question 15

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

Accepted Answer

Chemical digestion of carbohydrates, proteins, and fats in the small intestine

Question 16

Which of the following is a correct sequence for the movement of food through the digestive system?

Accepted Answer

Mouth → Stomach → Small intestine → Large intestine

Question 17

Which structure is primarily responsible for water absorption during digestion?

Accepted Answer

Large intestine

Question 18

A person with a damaged villi in the small intestine is likely to experience which of the following symptoms?

Accepted Answer

Reduced nutrient absorption

Question 19

Which of the following best describes the role of the stomach in protein digestion?

Accepted Answer

It produces pepsin, which breaks down proteins into peptides.

Question 20

A patient is unable to digest lactose due to a deficiency in the enzyme lactase. Where is this enzyme produced?

Accepted Answer

Small intestine

Human Digestive System: Structure, Function, and Metabolism

Study Guide - Practice Questions