Exam 2 Ch 10

Question 1

Estimates total body energy expenditure based on O2 used and CO2 produced

Answer 1

Calorimetry

Question 2

Volume of O2 consumed per minute

Answer 2

VO2

Question 3

Equation for VO2

Answer 3

volume of inspired O2 - volume of expired O2

Question 4

Volume of CO2 produced per minute

Answer 4

VCO2

Question 5

equation for VCO2

Answer 5

volume of expired CO2 - volume of inspired CO2

Question 6

Allows V of inspired air (unknown) to be directly calculated from V of expired air (known)

Based on constancy of N2 volumes

Answer 6

haldane transformation

Question 7

Ratio between rates of CO2 production and O2 usage

Answer 7

Respiratory exchange ratio (RER)

Question 8

equation for respiratory exchange ration (RER

Answer 8

RER = VCO2 production / VO2 consumption

Question 9

RER for 1 molecule of glucose

Answer 9

1.0

Question 10

RER for 1 molecule of palmitic acid

Answer 10

0.70

Question 11

Explain RER for various fuel mixtures

Answer 11

As you use more fat there is less carbohydrates being used and viceversa

Question 12

rate of energy use by the body

Answer 12

metabolic rate

Question 13

What is RER at rest

Answer 13

0.8 and VO2 is about 0.3 L/min

Question 14

What is metabolic rate at rest

Answer 14

2000 kcal/day

Question 15

Basal metabolic rate

Answer 15

rat of energy expenditure at rest (what you burn just being alive at a minimal level)
In supine position
Thermoneutral environment
After 8 h sleep and 12 h fasting

Question 16

Factors that effect BMR

Answer 16

Fat-free mass
body surface area
age
temperature (C)
stress
higher levels of T4 and epinephrin

Question 17

Resting metabolic rate

Answer 17

Takes into account that you do move around
about 1200 to 2400 kcal/day

Question 18

normal range for total daily metabolic activity

Answer 18

1800 to 3000 kcal/day

Question 19

Competitive athletes total daily metabolic activity

Answer 19

up to 10,000 kcal/day

Question 20

VO2 max

Answer 20

point at which O2 consumption doesn’t increase with further increase in intensity
Best single measurement of aerobic fitness

Question 21

When does VO2 max plateau

Answer 21

after 8-12 weeks of training

More training allows athlete to compete at higher percentage of VO2 max

Question 22

Absolute VO2 vs relative VO2

Answer 22

absolute - suitable for non-weight bearing activities

Relative - more accurate comparison for different body sizes because you use body weight