Question 1

Which of the following best describes the primary function of the small intestine in the digestive process?

Accepted Answer

Absorption of nutrients into the bloodstream and lymphatic system

Question 2

Which of the following mechanisms increases the surface area of the small intestine, thereby enhancing nutrient absorption?

Accepted Answer

Presence of villi, microvilli, and circular folds

Question 3

A patient is experiencing frequent heartburn. Which of the following is a likely cause and an effective management strategy?

Accepted Answer

Weak lower esophageal sphincter; avoid lying down after meals

Question 4

Which of the following best explains the difference between mechanical and chemical digestion?

Accepted Answer

Mechanical digestion involves breaking food into smaller pieces physically, while chemical digestion involves enzymatic breakdown of macromolecules.

Question 5

Which of the following is the correct order of digestive organs that food passes through, starting from the mouth?

Accepted Answer

Mouth → Esophagus → Stomach → Small Intestine → Large Intestine

Question 6

Which hormone is released when blood glucose levels are too low, and what is its primary function?

Accepted Answer

Glucagon; stimulates glycogenolysis and gluconeogenesis to increase blood glucose

Question 7

A person consumes a meal high in soluble fiber. Which of the following is a likely effect on intestinal transit time and blood cholesterol?

Accepted Answer

Slower intestinal transit time and decreased blood cholesterol

Question 8

Which of the following best describes the process of gluconeogenesis?

Accepted Answer

Synthesis of glucose from non-carbohydrate sources, such as amino acids, during periods of fasting

Question 9

Which of the following is a controllable risk factor for heart disease?

Accepted Answer

Diet high in saturated and trans fats

Question 10

A patient with lactose intolerance is advised to manage their symptoms by:

Accepted Answer

Consuming lactose-free dairy products or using lactase enzyme supplements

Question 11

Which of the following statements about triglycerides is correct?

Accepted Answer

They are composed of three fatty acids attached to a glycerol backbone and serve as the main form of stored energy in the body.

Question 12

Which of the following best describes the function of bile in fat digestion?

Accepted Answer

Emulsifies dietary fats, increasing their surface area for enzyme action

Question 13

Which of the following lipoproteins is responsible for transporting cholesterol from the tissues back to the liver for excretion?

Accepted Answer

HDL (High-Density Lipoprotein)

Question 14

A 35-year-old man is diagnosed with Type II Diabetes. Which of the following is the most likely cause and an appropriate treatment strategy?

Accepted Answer

Insulin resistance; increase physical activity and adopt a balanced diet

Question 15

Which of the following equations correctly represents the Acceptable Macronutrient Distribution Range (AMDR) for carbohydrates?

Accepted Answer

$$45\% \leq 	ext{Carbohydrate} \leq 65\% of $$total daily calories

Question 16

Which of the following is a benefit of omega-3 fatty acids, and which food is a rich source?

Accepted Answer

Reduce inflammation; fatty fish such as salmon

Question 17

Which of the following best describes the difference between whole wheat flour and enriched flour?

Accepted Answer

Whole wheat flour contains more fiber, vitamins, and minerals than enriched flour, which has some nutrients added back after processing.

Question 18

A person consumes a meal high in saturated fat. Which of the following is a likely effect on blood cholesterol and heart disease risk?

Accepted Answer

Increase in LDL cholesterol and higher risk of heart disease

Question 19

Which of the following is a recommended dietary guideline for added sugars according to the Dietary Guidelines for Americans?

Accepted Answer

Less than 10\% of total daily calories from added sugars

Question 20

Which of the following best describes the Mediterranean diet and its health effects?

Accepted Answer

Emphasizes fruits, vegetables, whole grains, olive oil, and fish; associated with reduced risk of heart disease

Digestive System, Carbohydrates, and Lipids: Study Guide for Nutrition Exam 2 (Chapters 3, 4, & 5)

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