Q: Which equation correctly represents the energy balance concept?

$$\text{Energy~Balance} = \text{Energy~Intake} - \text{Energy~Expenditure}$$

Question 1

Which of the following best explains why carbohydrates are the preferred fuel source during high-intensity exercise?

Accepted Answer

Carbohydrates can be metabolized both aerobically and anaerobically, providing rapid ATP production when oxygen is limited.

Question 2

A 25-year-old athlete is training for a marathon. During prolonged aerobic exercise, which macronutrient becomes the primary energy source as glycogen stores are depleted?

Accepted Answer

Fat

Question 3

Which equation correctly represents the energy balance concept?

Accepted Answer

$$	ext{Energy~Balance} = 	ext{Energy~Intake} - 	ext{Energy~Expenditure}$$

Question 4

A pregnant woman is advised to increase her folate intake during the first trimester. What is the primary reason for this recommendation?

Accepted Answer

Folate supports neural tube development, reducing the risk of neural tube defects.

Question 5

Which hormone is primarily responsible for stimulating milk production during lactation?

Accepted Answer

Prolactin

Question 6

A mother introduces solid foods to her infant at 3 months old. Which of the following is the most significant risk associated with this practice?

Accepted Answer

Increased risk of choking and food allergies

Question 7

Why are adolescent girls at higher risk for iron deficiency compared to boys?

Accepted Answer

Girls experience menstrual blood loss in addition to growth-related iron needs.

Question 8

Which of the following best distinguishes bulimia nervosa from anorexia nervosa?

Accepted Answer

Bulimia nervosa is characterized by recurrent binge eating followed by compensatory behaviors, while anorexia nervosa involves severe restriction of energy intake.

Question 9

A 70-year-old woman is diagnosed with osteoporosis. Which nutrient is most critical for her bone health, and why might supplementation be necessary?

Accepted Answer

Vitamin D, because aging reduces skin synthesis and intestinal absorption, increasing risk of deficiency.

Question 10

Which of the following is a primary goal of the Supplemental Nutrition Assistance Program (SNAP)?

Accepted Answer

To increase food security among low-income households by providing financial assistance for purchasing food

Question 11

A high school implements a new policy banning sugar-sweetened beverages. Which outcome would best demonstrate the effectiveness of this policy?

Accepted Answer

Increased sales of bottled water and decreased average student BMI

Question 12

Which of the following scenarios best illustrates the concept of sports anemia?

Accepted Answer

A runner experiences a temporary decrease in hemoglobin concentration due to increased plasma volume from endurance training.

Question 13

A 16-year-old adolescent frequently skips breakfast and consumes fast food for lunch. Which health risk is most directly associated with this dietary pattern?

Accepted Answer

Increased risk of obesity and nutrient deficiencies

Question 14

Which of the following best describes the physiological adaptation to regular aerobic exercise?

Accepted Answer

Increased glycogen storage capacity and improved cardiorespiratory fitness

Question 15

A 2-year-old child is offered grapes, whole nuts, and carrot sticks as snacks. Which of these foods is most appropriate, and why?

Accepted Answer

None, because all pose choking hazards for toddlers

Question 16

Which of the following best explains why older adults are at increased risk for vitamin D deficiency?

Accepted Answer

Decreased skin synthesis and reduced dietary intake with age

Question 17

A public health campaign aims to reduce pediatric obesity. Which strategy is most likely to be effective based on current evidence?

Accepted Answer

Encouraging daily physical activity and improving access to healthy foods in schools

Question 18

Which of the following statements about the effects of alcohol consumption during pregnancy is most accurate?

Accepted Answer

Alcohol can cause fetal alcohol spectrum disorders, especially when consumed in early pregnancy.

Question 19

A 60-year-old man is concerned about age-related macular degeneration. Which dietary recommendation is most appropriate to help reduce his risk?

Accepted Answer

Increase intake of foods rich in antioxidants such as vitamins C and E, and zinc.

Question 20

Which of the following best describes the role of public health initiatives in improving nutrition behaviors?

Accepted Answer

They implement policies and programs that create healthier food environments and increase access to nutritious foods.

Comprehensive Study Guide: Nutrition, Exercise, and Health Across the Lifespan

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