Diet Weight Loss Nutrition 1 — Questions and Answers
Question 1: What is a 'calorie deficit' and why is it central to weight loss?
- Eating zero calories for extended periods
- Consuming fewer calories than the body expends, causing the body to use stored energy (Correct answer)
- Burning more calories than one eats in a single day only
- Eating only negative-calorie foods
Correct answer: Consuming fewer calories than the body expends, causing the body to use stored energy
A calorie deficit occurs when calorie intake is less than total energy expenditure, forcing the body to use stored fat as fuel, which results in weight loss.
Question 2: Approximately how many calories are in one pound of body fat?
- 1,000 calories
- 2,000 calories
- 3,500 calories (Correct answer)
- 5,000 calories
Correct answer: 3,500 calories
One pound of body fat contains approximately 3,500 calories, meaning a 500-calorie daily deficit leads to roughly one pound of fat loss per week.
Question 3: Which macronutrient is most satiating per calorie and helps preserve muscle during weight loss?
- Carbohydrates
- Fat
- Protein (Correct answer)
- Fiber
Correct answer: Protein
Protein is the most satiating macronutrient per calorie and is essential for preserving lean muscle mass during a calorie deficit.
Question 4: What is 'metabolic adaptation' in the context of long-term dieting?
- The body's ability to absorb nutrients more efficiently over time
- The reduction in metabolic rate that occurs in response to sustained calorie restriction (Correct answer)
- An increase in appetite hormones that improves digestion
- A permanent change in fat cell structure after weight loss
Correct answer: The reduction in metabolic rate that occurs in response to sustained calorie restriction
Metabolic adaptation (or adaptive thermogenesis) is the body's tendency to reduce its metabolic rate in response to prolonged calorie restriction, making further weight loss harder.
Question 5: Which dietary strategy helps reduce hunger while maintaining a calorie deficit for weight loss?
- Eating only liquid meals
- High-volume, low-calorie foods (e.g., vegetables, lean protein) (Correct answer)
- Eating one large meal per day
- Avoiding all carbohydrates
Correct answer: High-volume, low-calorie foods (e.g., vegetables, lean protein)
Eating high-volume, low-calorie foods like vegetables and lean protein helps fill the stomach and signal satiety while keeping total calorie intake low.
Question 6: What does BMR (Basal Metabolic Rate) represent?
- Calories burned during exercise
- Calories needed to maintain weight with a sedentary lifestyle
- Calories the body burns at rest to maintain basic physiological functions (Correct answer)
- Maximum calorie intake for weight loss
Correct answer: Calories the body burns at rest to maintain basic physiological functions
BMR is the number of calories the body needs to sustain basic functions (breathing, circulation, cell repair) at complete rest.
Diet Weight Loss Nutrition 1
What is a 'calorie deficit' and why is it central to weight loss?