MCP - Turner - Intro to Nutrition - 2/27

Question 1

What are the formulas for calculating Resting Energy Expenditure (REE) in adult males and females?

Answer 1

Males: 900 + 10w

Females: 700 + 7w

*w=weight in kg (1kg=2.2lbs)

Question 2

List the steps for calculating weight loss

Answer 2

1. Find out how many kg/day person wants to lose
2. Multiply number above times 0.85 (adipose tissue)
3. Convert number above to g/day
4. Multiply number above by 9 Cal/g

Question 3

T/F Any recommended weight-loss diet must reduce the risk of developing Type 2 DM and atherosclerosis

Answer 3

True

It must also not significantly increase the risk of other diseases, such as cancer.

Question 4

T/F Inefficiency of KB metabolism can account for no more than a small percentage of the claimed weight loss

Answer 4

True

KB metabolism is not as inefficient as previously thought

Question 5

A male opera singer wishes to lose 22 lbs (10 kg) in 100 days in order to appear more credible in a new role as a swashbuckling love interest. His REE is 1900 Cal/day. (Note that, for this question, you don’t have to know his activity level; his ‘actual expenditure’ equals his REE times a coefficient for his activity level.) The singer’s present weight in pounds is:
A. 300
B. 240
C. 220
D. 200
E. 180

Answer 5

C. 220

If his REE is 1900, his weight must be 100 kg (from the formula REE = 900 + 10w). So, using the conversion factor for kg into pounds (which is given in the question), his present weight is 220 lbs.

Question 6

A male opera singer wishes to lose 22 lbs (10 kg) in 100 days in order to appear more credible in a new role as a swashbuckling love interest. His REE is 1900 Cal/day. (Note that, for this question, you don’t have to know his activity level; his ‘actual expenditure’ equals his REE times a coefficient for his activity level.) By about how many Calories per day must the singer reduce his energy intake in order to achieve his weight-loss goal (assuming no change in level of energy expenditure)?
A. 1530
B. 1090
C. 890
D. 765
E. 450

Answer 6

D. 765

To lose 10 kg of adipose tissue through reduced intake alone, he must take in 10 kg • 7650 Cal per kg of adipose tissue = 76,500 fewer Calories over the 100-day period. So he must reduce his daily intake by about 765 Cal. See pp. 15-16.

Question 7

Acetyl-CoA produced in the liver may be (a) oxidized there via the TCA cycle; or (b) converted to ketone bodies, exported to the bloodstream, and oxidized in the brain. Which statement is correct concerning the energy yields of the two processes (in ATP equivalents)?
A. The energy yield from a is more than double that from b.
B. The energy yield from b is more than double that from a.
C. a and b have identical energy yields.
D. a yields slightly less energy than b.
E. b yields slightly less energy than a.

Answer 7

E. b yields slightly less energy than a.

Question 8

Carmelo Anthony is 2.0 m tall and weighs 104 kg.

(a) What is Carmelo’s BMI?
(b) In what body mass category does his BMI place Carmelo, according to the WHO scheme and according to the more widely used popular descriptions?
(c) Do you think the BMI accurately reflects Carmelo’s degree of obesity? Why or why not?

Answer 8

(a) BMI = 26
(b) WHO: ‘grade 1 overweight’; popular: ‘overweight’.
(c) Heavily muscled persons (think of linebackers) can have BMI values that put them in the ‘overweight’ or even in the ‘obese’ category, even though they have relatively low body fat. Other measures of obesity can and should be used instead.