BIOS 3455 Lab I Metabolic Rate and Body Fuel Stores Practice Exam

predicted (average) basal metabolic rate for men in the 20-30 age group

40.5 kcal/m2hr

RER when the subject is catabolizing mostly, but not exclusively, fats to meet their body's energy needs

0.76

What is the heat production of a 25 year old man with an average basal metabolic rate and a body surface area of 1.8?

72.9 kcal/m2hr

predicted (average) basal metabolic rate for women in the 20-30 age group

36.8 kcal/m2hr

predicted (average) basal metabolic rate for a 62 year old woman

33.6 kcal/m2hr

RER when the subject is catabolizing mostly, but not exclusively, carbohydrates to meet their body's energy needs

0.93

Basal metabolic rate of a 25 year old woman with hyperthyroidsim whose metabolic rate is 20% different from her predicted value

44.16 kcal/m2hr

Your subject is a 232 pound male who is 73 inches tall. What is his body surface area using the nomogram below? (do not include units, answer to nearest hundredth)

2.3

if a subject is 23 % efficient at converting food energy into useful work, then you would expect ____ kcal out of 439 kcal of food would be given off as heat. (no units required)

338.03

Your subject is a 21 year old female who has a VO2 of 0.40, a body surface area of 1.65 m2, and an RER of 0.92. What is her heat production? (calculate in their traditional units for humans; no units required, calculate to one decimal place)

118.8

Several hormones influence metaboic rate, but ____________ hormones have the greatest impact on metabolic rate

thyroid

Your subject is a 29 year old male who weighs 196.1 pounds and is 9.1 % body fat. His blood glucose is 90 mg/dl, his VO2 is 0.3 L/min and his RER is 0.86. How many kcal of fat does this subject have in stored in their body? (no units required, calculate to one decimal place)

62,457.9

Your subject is a 23 year old female who has a VO2 of 0.228, a VCO2 of 0.200, and a body surface area of 1.7m2, . What is her RER? (no units required, calculate to two decimal places)

0.88

Your subject is a 27 year old female who weighs 151.3 pounds and is 29.5 % body fat. Her blood glucose is 64 mg/dl, her VO2 is 0.3 L/min and her RER is 0.76. How many kcal of glucose does she have circulating in her blood? (no units required, calculate to one decimal place)

12.5

Your subject is a 22 year old male who has a VO2 of 0.39, a body surface area of 1.78 m2, and an RER of 0.81. What is his metabolic rate? (calculate in their traditional units for humans; no units required, calculate to one decimal place)

63.3

Which of the following is/are true about the effects of age and gender on metabolic rate?

-fat stores may increase with age if we do not decrease calorie consumption because metabolic rate declines as a function of age

-Anabolic processes one important reason why metabolic rates are very high prior to age 16 in women and 18 in men

-on average, women's metabolic rate is approximately 10% lower than you would find in men of similar age

-metabolic rate tends to decline as a function of age beyond the 20s because of loss of muscle mass

-the difference in average metabolic rate between men and women is likely due to differences in muscle mass between genders

___________ refers to metabolic reactions where larger molecules are broken down to smaller moleules; often generating some energy as chemical bonds are broken.

catabolism

Which of the following is/are NOT true about our experiments and how we determine metabolic rate in the lab?

two of these answers

Your subject is a 27 year old woman who has an RER of 0.87, a BMR of 30.8 , and she is 26% body fat. What is her metabolic rate as a percent of predicted? Do not include units, calculate to one decimal place

-16.3

How do you calculate metabolic rate?

1. convert to kcal/min: multiply VO2 and caloric equivalent

2. convert kcal/min to kcal/hr: multiply kcal/min by 60

3. divide kcal/hr by body surface area

How do you calculate heat production?

1. multiply VO2 by caloric equivalent → kcal/min

2. multiply kcal/min by 60 min → kcal/hr

How do you calculate how many kcal of fat someone has in their body?

1. multiply total body weight by body fat percentage

2. multiply that number by 3,500

How do you calculate RER?

divide VCO2 by VO2

How do you calculate how many kcal of glucose someone has circulating in their blood?

1. convert lbs to kg (divide lbs by 2.205 kg)

2. multiply by 71 ml/kg

3. divide by 100

4. multiply by blood glucose

5. convert mg to g (divide mg by 1000)

6. g → kcal: multiply by 4 kcal/g

Metabolic rate is influenced by muscle mass, which is known to decline with age. The loss of muscle mass with age is called

sarcopenia

Food consumption/eating influences metabolic rate and RER, which of the following is/are true about this effect? (Select all that are true)

-eating tends to increase metabolic rate

-the effect is sometimes called the thermic effect of food

-among the major macronutrients (fats, proteins, carbohydrates), this effect is greatest for proteins

Your subject is a 51 year old woman with a body surface area of 1.8m2. Her VCO2 is 0.194L/min and her VO2 is 0.204L/min. Which of the following best describes what fuels her body is using based on this data?

she is using mostly carbohydrates

If your subject's VO2 was 1.0 L/min and their VCO2 were 0.7 L/min, then:

their RER would be 0.7 AND they would be metabolizing mostly fats