Q: Calculate the percentage of calories from fat in a meal containing 25 grams of fat and 600 total calories. Use the formula $$\text{Percent calories from fat} = \frac{\text{grams of fat} \times 9}{\text{total calories}} \times 100.$$

$$\frac{25 \times 9}{600} \times 100 = 37.5\%$$

Q: A person consumes 2,000 calories per day. According to recommendations, what is the maximum number of calories that should come from saturated fat? Use the formula $$\text{Max saturated fat calories} = \text{total calories} \times 0.07.$$

$$2,000 \times 0.07 = 140$$ calories

Question 1

Which of the following statements best describes the structural difference between triglycerides and phospholipids?

Accepted Answer

Triglycerides have three fatty acids attached to a glycerol backbone, while phospholipids have two fatty acids and a phosphate group attached to a glycerol backbone.

Question 2

Which type of fatty acid is most likely to be solid at room temperature, and why?

Accepted Answer

Saturated fatty acids, because all carbons are bonded to hydrogen atoms with no double bonds, allowing tight packing.

Question 3

A food manufacturer wants to increase the shelf life of a product by making its fats more resistant to rancidity. Which process and type of fat are most likely to be used?

Accepted Answer

Hydrogenation to create trans fats.

Question 4

Which lipoprotein is responsible for removing cholesterol from the body and delivering it to the liver for excretion?

Accepted Answer

High-density lipoprotein (HDL)

Question 5

Which of the following is an essential fatty acid, and what is its primary function in the body?

Accepted Answer

Alpha-linolenic acid; precursor to eicosanoids involved in inflammation and blood clotting.

Question 6

Calculate the percentage of calories from fat in a meal containing 25 grams of fat and 600 total calories. Use the formula $$	ext{Percent calories from fat} = \frac{	ext{grams of fat} 	imes 9}{	ext{total calories}} 	imes 100.$$

Accepted Answer

$$\frac{25 	imes 9}{600} 	imes 100 = 37.5\%$$

Question 7

Which dietary change is most effective for lowering LDL cholesterol according to current recommendations?

Accepted Answer

Increase intake of soluble fiber from plant foods.

Question 8

A patient has a total cholesterol level of 250 mg/dL and an HDL level of 35 mg/dL. According to guidelines, what is the most concerning risk factor for heart disease in this patient?

Accepted Answer

Low HDL cholesterol level.

Question 9

Which of the following foods is highest in omega-3 fatty acids and recommended for heart health?

Accepted Answer

Fatty fish such as salmon.

Question 10

What is the Acceptable Macronutrient Distribution Range (AMDR) for fat intake as a percentage of total daily calories?

Accepted Answer

20 to 35 percent.

Question 11

Which of the following statements about cholesterol is TRUE?

Accepted Answer

The body makes all the cholesterol it needs; dietary cholesterol has less impact on blood cholesterol than saturated fat.

Question 12

Which of the following is a function of fat in the human body?

Accepted Answer

Insulation to maintain body temperature.

Question 13

A person consumes 2,000 calories per day. According to recommendations, what is the maximum number of calories that should come from saturated fat? Use the formula $$	ext{Max saturated fat calories} = 	ext{total calories} 	imes 0.07.$$

Accepted Answer

$$2,000 	imes 0.07 = 140$$ calories

Question 14

Which of the following is a major food source of saturated fat in the American diet?

Accepted Answer

Cheese and processed meats.

Question 15

Which of the following best explains why plant sterols can help lower LDL cholesterol?

Accepted Answer

They compete with cholesterol for absorption in the intestinal tract.

Question 16

Which of the following dietary patterns is associated with a lower risk of heart disease and cancer?

Accepted Answer

Traditional Mediterranean diet.

Question 17

Which of the following is NOT a controllable risk factor for heart disease?

Accepted Answer

Family history of heart disease.

Question 18

Which of the following is a recommended replacement to reduce saturated fat intake in the diet?

Accepted Answer

Choose low-fat frozen yogurt instead of chocolate ice cream.

Question 19

Which of the following statements about fat substitutes is correct?

Accepted Answer

Most fat substitutes are carbohydrate-based and use plant polysaccharides.

Question 20

A person is trying to increase their intake of alpha-linolenic acid. Which food should they choose?

Accepted Answer

Flaxseeds.

Fats, Oils, and Other Lipids: Structure, Function, and Nutrition

Guida di studio - Domande di pratica

Study guide - Flashcard