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Explain why the measurement of energy by a bomb calorimeter and a human calorimeter is the same or different for the four energy-containing nutrients.

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The measurement of energy by a bomb calo...

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Explain several reasons why estimates of resting metabolic rate could be inaccurate.

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There are several reasons why estimates ...

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When compared to machines, humans are relatively efficient at converting energy.

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Under the most demanding conditions (e.g., very high-intensity exercise) , ATP concentrations in skeletal muscles are not likely to drop more than:


A) 5-10%.
B) 10-20%.
C) 20-30%.
D) 40-50%.

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Which of the following is an endergonic reaction?


A) The releasing (triggering) of a mouse trap
B) The release of water from behind a dam
C) The breakdown of ATP to ADP
D) The rephosporylation of ADP

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Fat-free tissue is more metabolically active than adipose tissue.

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The most practical, effective, and healthful way to increase resting metabolic rate is to ______.

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increase s...

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Exercise and hormonal changes may raise resting metabolic rate but their effects are subtle rather than dramatic.

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The minimum energy expenditure compatible with life is known as:


A) resting metabolism.
B) basal metabolism.
C) thermic effect of energy.
D) resting exchange ratio.

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indicate the influence of each factor on resting metabolic rate. -Genetics


A) Influence not under voluntary control
B) Substantial influence, under some voluntary control
C) Subtle or temporary influence, under some voluntary control

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When compared to basal metabolic rate, resting metabolic rate is:


A) essentially the same.
B) ~10% lower.
C) ~10% greater.
D) none of the above

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C

The majority of ATP stored in skeletal muscle cannot be used for force production, even during very high intensity exercise.

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Measuring heart rate during exercise is a practical, fairly accurate way to predict the amount of energy being expended during exercise.

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The smallest influence on "energy out" is:


A) resting metabolism.
B) thermic effect of food.
C) physical activity.
D) basal metabolic rate.

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indicate the influence of each factor on resting metabolic rate. -Thyroid hormones


A) Influence not under voluntary control
B) Substantial influence, under some voluntary control
C) Subtle or temporary influence, under some voluntary control

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A

Indirect calorimetry works on the principle that:


A) a rise in body temperature reflects the amount of energy expended.
B) the body heat that is produced is proportional to the energy expended.
C) oxygen consumption and carbon dioxide production are related to energy expenditure.
D) energy expenditure can be predicted if respiration and perspiration are carefully measured.

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To maintain energy balance, it is estimated that a sedentary individual requires approximately _____ kcal/kg of body weight daily.


A) 20
B) 25
C) 30
D) 35

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Match the energy measurement technique with the statement that best describes it. Use each answer only once. -Metabolic cart


A) Gas-exchange method used in many exercise physiological labs
B) Used in free-living situations to measure energy expenditure over weeks
C) Used to directly measure thermal energy in food
D) Direct calorimetry method used with humans for research purposes

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A quick estimate of daily energy expenditure ranges from 30 to > 50 kcal/kg of body weight, depending on the amount of physical activity included.

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Calculate an estimated energy requirement for a 24-hr period using a simple formula.

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To calculate an estimated energy requirement for a 24-hour period using a simple formula, you can use the Harris-Benedict equation. For men, the formula is: BMR = 88.362 + (13.397 x weight in kg) + (4.799 x height in cm) - (5.677 x age in years) For women, the formula is: BMR = 447.593 + (9.247 x weight in kg) + (3.098 x height in cm) - (4.330 x age in years) Once you have calculated the Basal Metabolic Rate (BMR) using the appropriate formula, you can then multiply it by an activity factor to estimate the total energy requirement for a 24-hour period. For example, if the person is sedentary, you would multiply the BMR by 1.2. If the person is moderately active, you would multiply the BMR by 1.55. And if the person is very active, you would multiply the BMR by 1.725. By using these formulas and activity factors, you can estimate the energy requirement for a 24-hour period based on an individual's weight, height, age, and activity level. Keep in mind that this is just an estimate and individual variations in metabolism and activity levels should also be considered.

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