Lab Test 1 (lab 3) Flashcards
Purpose of the open circuit, indirect calorimetry (3 variables)
VO2
Respiratory quotient
caloric expenditure
VO2
volume of oxygen consumed per unit time
O2 consumption rate
T/F: we consume all of the O2 we inhale
F
VO2 does these two things
measure of O2 used for energy purposes
measure and compare cardiorespiratory fitness
R, RQ, or RER
respiratory quotient
RER
respiratory exchange ratio
Respiration quotient does these two things
indicates the type of energy substrate being utilized
Non-protein RER
R = 0.70
100% fat being utilized
R = 1.0
100% CHO being utilized
T/F as intensity increases R should decrease
F
R = (formula)
VCO2 / VO2
CER
caloric expenditure rate
caloric expenditure rate is
calories (kcals) expended per minute
Caloric expenditure rate is directly related to this
O2 consumption
open circuit indirect calorimetry is used to determine the activities of this type of respiration
Aerobic
T/F indirect calorimetry is rarely used, and direct calorimetry is far more common in the lab
F
The more O2 available or the more O2 you can utilize means this
the more energy you can produce
This results in a backup in metabolic pathways and the failure to produce energy
no available O2, as a result of increasing intensity
In aerobic respiration glycolysis leads to this, which leads to this
Krebs cycle
electron transport system
In anaerobic respiration lactic acid leads to this and this
Lactate + H
Fatigue
What is VO2max
maximal ability to take in, transport, and utilize O2 during exercise
2 ways to measure O2 consumption
Blood analysis
respiratory analysis
Blood analysis or respiratory analysis: catheterize the femoral vein and artery
blood analysis
Blood analysis or respiratory analysis: direct = chamber measurement
respiratory
Blood analysis or respiratory analysis: direct measurement
blood
Blood analysis or respiratory analysis: invasive
blood
Blood analysis or respiratory analysis: open or close-circuit spirometry, less invasive
respiratory
Blood analysis or respiratory analysis: uncomfortable and inconvenient
blood
science that quantifies the heat released from metabolism
calorimetry
Factors that must be measured to determine VO2
VI
STPD
%O2e
%CO2e
STPD =
0.885
What type of analysis did we do in this lab
indirect gas collection
kilocalorie (kcal) =
amount of energy (heat) needed to increase 1 kg (1 liter) water 1 degree C
Calorie -
amount of energy (heat) needed to increase 1 gram (1 mL) of water 1 degree C
Calories per kcal
1000
units of caloric expenditure rate (CER)
kcal X min ^-1
how to determine CER
(kcal X L O2^-1) X (L O2 x min^-1)
Describe a graph of RER vs workload
positive linear slow from 0.7 to 1.0
How does training affect the graph of RER vs workload
moves the line to the right
Describe the graph of VO2 vs workload
linear slope form 3.5 ml/kg/min to a plateau point
How does training affect the graph of VO2 vs workload
moves the line down
VI =
volume inhaled (L/min)
VO2 =
VO2i - VO2e
RER =
VCO2 / VO2
VCO2 =
VCO2e - VCO2i
RER is used to determine this
kcal / L O2 consumed
Resting O2 consumption
3.5 ml/kg/min
Absolute value (units) in regard to VO2
L/min
Relative value (units) in regard to VO2
ml/kg/min
Average collage kind VO2max
30-35 ml/kg/min
Average elite athlete VO2max
60-75 ml/kg/min
Average pulmonary patients VO2max
13-15 ml/kg/min
Two physiological components of VO2max
cardiac output max (delivery)
A-V O2 diff-max (utilization)
CO =
HR x SV
THis accounts for most of the differance in Cardiac Output
stroke volume (SV)
