Weight Management & Metabolism Quiz

1. What does BMR (Basal Metabolic Rate) measure?

1. The efficiency with which the body absorbs nutrients from food
2. The maximum number of calories burned during intense exercise
3. The number of calories the body needs at complete rest to maintain basic bodily functions
4. The rate at which the body converts carbohydrates to fat

2. What does a calorie deficit mean, and why is it the basic principle behind weight loss?

1. Consuming fewer calories than the body expends, causing the body to draw on stored energy (fat) for fuel
2. Cutting all fats and sugars from the diet completely
3. Eating fewer calories than a specific target number, regardless of activity level
4. Eating only nutrient-dense foods with no calorie-dense foods

3. BMI (Body Mass Index) is calculated as weight in kg divided by height in metres squared. What are the limitations of BMI as a health measure?

1. It cannot distinguish between fat mass and muscle mass, and doesn't account for fat distribution, ethnicity, age, or sex
2. It is completely accurate and has no meaningful limitations
3. It is only accurate for people aged 18-40
4. It only measures body fat percentage, not overall health

4. The 'thermic effect of food' (TEF) refers to:

1. The energy the body expends digesting, absorbing, and metabolising food — typically 10% of total calories
2. The increase in metabolism caused by eating more frequently throughout the day
3. The way heat from cooking changes the calorie content of food
4. The way spicy food temporarily raises body temperature

5. Leptin and ghrelin are hormones that regulate appetite. Which correctly describes each?

1. Both leptin and ghrelin increase hunger — they work together
2. Leptin increases hunger; ghrelin reduces hunger
3. Leptin is produced by fat cells and signals fullness/satiety; ghrelin is produced by the stomach and signals hunger
4. Leptin is released after exercise; ghrelin is released after sleep

6. Visceral fat is considered more dangerous than subcutaneous fat. What is visceral fat and why is it harmful?

1. Fat stored around the internal organs (liver, pancreas, intestines) — it is metabolically active and releases inflammatory chemicals
2. Fat stored in muscle tissue — it reduces muscle efficiency and causes insulin resistance
3. Fat stored in the face and extremities — it indicates hormonal imbalance
4. Fat stored under the skin — it is harmful because it prevents heat dissipation

7. Which macronutrient is most effective at promoting satiety (fullness) per calorie?

1. Carbohydrates
2. Fat
3. Fibre (technically a carbohydrate but functionally distinct)
4. Protein

8. What is 'metabolic adaptation' (also called adaptive thermogenesis)?

1. The body's increase in metabolic rate after a period of overeating
2. The gradual improvement in metabolic health as a result of sustained healthy eating
3. The process by which muscles become more efficient at burning fat during exercise
4. The reduction in metabolic rate that occurs in response to calorie restriction, making further weight loss increasingly difficult

9. The keto (ketogenic) diet is very low in carbohydrates. What metabolic state does it aim to achieve?

1. Autophagy — where the body recycles damaged cellular components for energy
2. Gluconeogenesis — where the liver makes glucose from protein
3. Ketosis — where the liver produces ketone bodies from fat as an alternative fuel when glucose is scarce
4. Lipolysis — where fat cells release stored fatty acids into the bloodstream

10. Muscle mass is important for metabolic health. Approximately how many more calories per day does 1 kg of muscle burn compared to 1 kg of fat?

1. 1 kg of muscle burns 100 times more calories than fat at rest
2. 1 kg of muscle burns about 13 calories/day at rest vs. about 4-5 calories/day for fat
3. 1 kg of muscle burns about 5 times more than fat at rest
4. They burn approximately the same amount — the difference is negligible

11. Intermittent fasting (IF) involves cycling between periods of eating and fasting. Which of these is the most commonly practised IF protocol?

1. Alternate day fasting — eating normally one day, then fasting completely the next
2. The 16:8 method — fasting for 16 hours and eating within an 8-hour window daily
3. The 5:2 method — eating normally five days, then eating nothing for two days
4. The OMAD (one meal a day) protocol — consuming all calories in a single daily meal

12. What is the difference between weight loss and fat loss?

1. Fat loss can only be achieved through surgery; weight loss can be achieved through diet
2. They are the same thing — losing weight always means losing fat
3. Weight loss is any reduction in total body weight (which can include water, muscle, and fat); fat loss specifically refers to reduction in body fat stores
4. Weight loss refers to losing water weight; fat loss requires exercise

13. Which of the following is the most evidence-based long-term weight management strategy?

1. Short-term intensive diets followed by maintenance phases
2. Strict calorie counting and eliminating all processed foods permanently
3. Sustainable lifestyle changes — modest calorie reduction, regular physical activity, behaviour change, and adequate sleep — maintained over years
4. Using meal replacement shakes for the majority of meals indefinitely

14. Sleep deprivation affects weight management. How does poor sleep promote weight gain?

1. It increases cortisol, raises ghrelin (hunger hormone), lowers leptin (satiety hormone), and promotes cravings for calorie-dense foods
2. It only affects weight in people who are already overweight
3. It primarily reduces motivation to exercise but has no direct metabolic effects
4. It slows metabolism so dramatically that weight gain is inevitable regardless of diet

15. What is NEAT (Non-Exercise Activity Thermogenesis) and why is it important for weight management?

1. All energy expended through physical movement outside of sleeping, eating, and formal exercise — including walking, standing, fidgeting, and daily tasks
2. The difference between active and resting metabolic rate
3. The metabolic rate during non-fasting periods of the day
4. The number of calories burned during formal exercise sessions only

16. Which measurement is considered a more reliable indicator of metabolic health risk than BMI alone?

1. Body weight in kilograms
2. Percentage of calories from fat in the diet
3. Total cholesterol level
4. Waist circumference and waist-to-hip ratio

17. The insulin hormone plays a central role in metabolism and weight. What is insulin's primary role after eating carbohydrates?

1. To allow cells to take up glucose from the blood, lowering blood sugar — and to promote fat storage when glucose is abundant
2. To break down stored glycogen in the liver into glucose
3. To signal the liver to produce more glucose for energy
4. To stimulate the release of glucagon to balance blood sugar

18. Which hormone, often called the 'metabolic regulator,' directly controls how fast cells burn energy?

1. Cortisol
2. Human growth hormone
3. Insulin
4. Thyroid hormone (T3/T4)

19. Research shows that weight cycling ('yo-yo dieting') may be harmful. What are its documented effects?

1. It is beneficial because each cycle provides practice for sustainable weight loss
2. It is completely harmless — the body fully resets to normal after each cycle
3. It may increase cardiovascular disease risk, reduce muscle mass over time, and make subsequent weight loss harder due to metabolic adaptation
4. It only affects mental health — physical health effects are minimal

20. What is the most important factor for long-term weight maintenance after successful weight loss?

1. Continuing to count calories indefinitely
2. Eating only low-fat foods permanently
3. Periodic fasting to counteract any weight regain
4. Regular physical activity — particularly high volume of moderate-intensity exercise