Question

Which of the following statement is correct regarding the Basal metabolic rate?

• A. It is the number of calories needed to maintain energy level during exercise.
• B. It is the number of calories needed to maintain the body at movement.
• C. It is the number of calories needed to maintain body function at high speed.
• D. It is the number of calories needed to maintain body function at rest.

Hint:

Factors like age, muscle mass, and gender significantly affect BMR. Generally, the more muscle mass you have, the higher your BMR.

Answer 1

The Correct Option is D

The question asks us to identify the correct statement regarding Basal Metabolic Rate (BMR). Let's discuss the concept of BMR to understand better.

Basal Metabolic Rate (BMR):

• BMR is the amount of energy expressed in calories that a person needs to keep the body functioning at rest.
• This includes the energy required to maintain critical physiological functions such as breathing, circulation, cell production, nutrient processing, protein synthesis, and ion transport.

Now, let's analyze each of the given options:

1. It is the number of calories needed to maintain energy level during exercise: This statement is incorrect because BMR refers to the calories required at rest, not during exercise. The energy needed during exercise is accounted for under different terminology like Exercise Metabolic Rate (EMR).
2. It is the number of calories needed to maintain the body at movement: This option is also incorrect. Movement involves additional energy beyond the basal level and is not classified under BMR.
3. It is the number of calories needed to maintain body function at high speed: This statement is incorrect, as it is about maintaining body functions at rest, not at high speed.
4. It is the number of calories needed to maintain body function at rest: This is the correct statement. BMR is specifically the energy expenditure needed to maintain basic body functions without any additional physical activity.

Hence, the correct answer is the last option: It is the number of calories needed to maintain body function at rest.

Answer 2

An easy way to lock in what BMR actually measures is to picture a person who is fully asleep, and ask what the body is still spending energy on even though the person isn't moving at all, since that is exactly the condition BMR is measured under.

1. It is the number of calories needed to maintain energy level during exercise: A sleeping person is not exercising, so this describes a completely different scenario from the resting state that defines BMR.
2. It is the number of calories needed to maintain the body at movement: A sleeping person is not moving either, so calories tied to movement again fall outside what BMR is measuring.
3. It is the number of calories needed to maintain body function at high speed: "High speed" implies some form of vigorous activity, which is the opposite of the fully rested, motionless state BMR is defined under.
4. It is the number of calories needed to maintain body function at rest: Even while asleep and completely still, the body keeps breathing, circulating blood, repairing cells, and regulating temperature, and the energy this requires, typically making up roughly 60 to 75 percent of a sedentary person's total daily calorie use, is exactly what BMR measures.

Since BMR is specifically the energy cost of staying alive while at complete rest, with no movement, exercise, or digestion involved, the statement describing calories needed at rest is the one that matches.

Therefore, the correct answer is It is the number of calories needed to maintain body function at rest.