What is the rate at which the body burns energy when at rest called?

• A. Resting metabolic rate
• B. Total daily energy expenditure
• C. Thermic effect of food
• D. Basal metabolic rate (BMR)

Answer: (D)

Basal metabolic rate describes the minimum amount of energy the body needs to keep essential organs functioning while at complete rest after an overnight fast and in a neutral environment. This makes it the most precise way to express the rate at which the body burns energy when at rest. Resting metabolic rate is similar but measured under looser conditions and can be a bit higher because factors like recent activity or meals can raise energy use. The thermic effect of food is the energy used to digest and process nutrients, a separate component of total energy expenditure, not the baseline rest rate. Total daily energy expenditure combines BMR with all daily activities and processes.