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Flashcards in energy metabolism Deck (24):
1

BMI equation

BMI = weight (kg)/height^2 (m^2)

2

what type of obesity has most increased health risks?

intra-abdominal

3

definition of kcal

heat required to raise 1 kg water by 1*C

4

why is all of the energy from protein not available for ATP synthesis?

some of the energy from protein needs to be used for urea synthesis (so it can be excreted)

5

4 components of energy expenditure

basal metabolic rate- 60%
purposeful activity- 25%
Thermic effect of food- 8%
non-exercise activity- 7%

6

main storage of energy

as TAG in adipocytes

7

what is measured in indirect calorimetry?

oxygen consumption vs. carbon dioxide production

8

respiratory quotient equation

CO2 released/O2 consumed

9

RQ of CHO only

1.0

10

RQ of fat only

0.71

11

why is protein usually omitted from RQ studies?

harder to measure, need 24 urea excretion

12

equation to determine the quantity of each food consumed

RQ + O2 consumed

13

difference between REE and BMR

REE usually greater by about 10%, bc BMR is measured at fasting and REE is not

14

REE for males, females

males- 1 kcal/kg/hr
females- 0.9 kcal/kg/hr

15

why is REE different in men vs women?

men are thought to have more lean mm mass

16

effect of age on REE

REE decreases about 2% per decade

17

effect of pregnancy and lactation on REE

increases REE

18

effect of weight training on REE

increases REE with increased lean mm mass

19

effect of starvation on REE

REE decreases

20

effect of hyper catabolic state on REE

REE increases

21

how is REE estimated for overweight pts?

based on ideal weight

22

METs

multiples of REE, used to quantify activity

23

equation for energy requirement

REE x activity factor

24

max amount of adiposity that can be lost in 1 week

4 lbs