Weight Loss Weight Loss Metabolism

Question 1

What does 'Basal Metabolic Rate' (BMR) represent in the context of weight management?

Accepted Answer

The minimum calories needed to sustain basic body functions at rest

Answer

BMR is the number of calories the body requires to maintain vital functions (breathing, circulation, cell production) at complete rest, comprising about 60–70% of total daily energy expenditure.

Question 2

Which factor has the greatest influence on an individual's basal metabolic rate?

Accepted Answer

Lean muscle mass

Answer

Lean muscle mass is the strongest determinant of BMR because muscle tissue is metabolically active and burns significantly more calories at rest than fat tissue.

Question 3

What is the thermic effect of food (TEF) and approximately what percentage of daily caloric expenditure does it represent?

Accepted Answer

The energy used to digest, absorb, and metabolize food; approximately 10%

Answer

TEF is the energy expenditure associated with digesting and processing food, accounting for approximately 10% of total daily energy expenditure, with protein having the highest TEF at 20–30%.

Question 4

How does aging affect metabolism and body composition in ways relevant to weight management?

Accepted Answer

Metabolism slows and muscle mass declines naturally after age 30–40, reducing BMR

Answer

Age-related sarcopenia (muscle loss) reduces lean body mass, lowering BMR and making it progressively easier to gain weight and harder to lose it without deliberate resistance training.

Question 5

What is the difference between 'fat loss' and 'weight loss' and why is the distinction important?

Accepted Answer

Weight loss includes loss of muscle and water, while fat loss specifically targets adipose tissue

Answer

Weight loss reflects total mass reduction including muscle, water, and fat, while fat loss specifically targets adipose tissue; preserving muscle during a deficit is critical for metabolic health.

Weight Loss Practice Test

Weight Loss Practice Test

Weight Loss Weight Loss Metabolism