Final exam EXSC 530: Exercise
Metabolism Test Questions All Solved.
Differentiate between direct and indirect calorimetry - Answer Direct measure heat;
indirect measure gas, oxygen and carbon dioxide
What is respiratory exchange ratio (RER)? - Answer the ratio of carbon dioxide produced to the oxygen
consumed (VCO2/VO2)
Estimate fuel use: 0.7 ~ fat, .
How is RER used to estimate the substrate utilized during steady state aerobic exercise? - Answer RER
related to the fact that fat and carbohydrate differ in the amount of O2 used and CO2 produced during
oxidation.
Protein: "non protein R"
must reach steady state, Estimated fuel use:
Carbohydrate:
VCO2/VO2 =
6CO2/6O2 =
R= 1.0
Fat:
R= VCO2/VO2 =
16 CO2/23 O2=
R= 0.7
, How does RER change with increasing intensity? - Answer Increase in intensity influence R to increase.
there is a shift from fat to carbohydrate metabolism because there is recruitment of fast fibers and
increase in blood levels of epinephrine.
Fast fibers have high glycolytic enzymes thus fast fibers metabolize carbohydrates better than fats.
How does RER change with long duration, steady-state, submaximal exercise? - Answer During
prolonged, low to moderate-intensity, R decrease over time indicating that there is a shift form
carbohydrate to fat metabolism due to an increase in liplysis
What is the caloric equivalent for 1 liter of oxygen consumed?
♣ Be able to calculate kilocalorie expenditure based on oxygen consumption. - Answer 4.7 kcal/L
Describe the changes in oxygen uptake during the transition from rest to steady-state, submaximal
exercise to post-exercise recovery. - Answer Page 74-47
Define O2 deficit, - Answer Lag in oxygen uptake at the beginning of exercise
Define steady state VO2 - Answer When the metabolic needs are met
Define excess post exercise consumption (EPOC) - Answer Excess post-exercise oxygen consumption
(oxygen debt)
the VO2 above rest following exercise.
What causes EPOC - Answer 1. O2 consumed early in the recovery period is used to resynthesizes
stored PC in the muscle
2. Lactate conversion to glucose
3. replace O2 stores in both muscle and blood
4. Elevated body temperature
Metabolism Test Questions All Solved.
Differentiate between direct and indirect calorimetry - Answer Direct measure heat;
indirect measure gas, oxygen and carbon dioxide
What is respiratory exchange ratio (RER)? - Answer the ratio of carbon dioxide produced to the oxygen
consumed (VCO2/VO2)
Estimate fuel use: 0.7 ~ fat, .
How is RER used to estimate the substrate utilized during steady state aerobic exercise? - Answer RER
related to the fact that fat and carbohydrate differ in the amount of O2 used and CO2 produced during
oxidation.
Protein: "non protein R"
must reach steady state, Estimated fuel use:
Carbohydrate:
VCO2/VO2 =
6CO2/6O2 =
R= 1.0
Fat:
R= VCO2/VO2 =
16 CO2/23 O2=
R= 0.7
, How does RER change with increasing intensity? - Answer Increase in intensity influence R to increase.
there is a shift from fat to carbohydrate metabolism because there is recruitment of fast fibers and
increase in blood levels of epinephrine.
Fast fibers have high glycolytic enzymes thus fast fibers metabolize carbohydrates better than fats.
How does RER change with long duration, steady-state, submaximal exercise? - Answer During
prolonged, low to moderate-intensity, R decrease over time indicating that there is a shift form
carbohydrate to fat metabolism due to an increase in liplysis
What is the caloric equivalent for 1 liter of oxygen consumed?
♣ Be able to calculate kilocalorie expenditure based on oxygen consumption. - Answer 4.7 kcal/L
Describe the changes in oxygen uptake during the transition from rest to steady-state, submaximal
exercise to post-exercise recovery. - Answer Page 74-47
Define O2 deficit, - Answer Lag in oxygen uptake at the beginning of exercise
Define steady state VO2 - Answer When the metabolic needs are met
Define excess post exercise consumption (EPOC) - Answer Excess post-exercise oxygen consumption
(oxygen debt)
the VO2 above rest following exercise.
What causes EPOC - Answer 1. O2 consumed early in the recovery period is used to resynthesizes
stored PC in the muscle
2. Lactate conversion to glucose
3. replace O2 stores in both muscle and blood
4. Elevated body temperature
