chapter 13 Flashcards
Daltons law
total pressure is the sum of partial pressures of all gases in a mixture
what is the barometric pressure at sea level
760 mmHg
what is the partial pressure of oxygen
159 mmHg
What percentage of saturation of hemoglobin should young healthy people have
young people should have a saturation of 97%
what is the alveolar partial pressure
103 mmHg
what is the equation for partial pressure of a gas
barometric pressure x concentration fraction
what is the partial pressure of carbon dixiode
0.23 mmHg
what is the partial pressure of nitrogen
600 mmHg
from the alveoli, oxygen is transported via
- bound to Hb
- dissolved in the blood
VO2 depends on
- O2 delivery to tissues
- O2 use in mitochondria
partial pressure of water vapour
47mmHg
what is the saturation of gases in the airways
100%
Alveolar air is altered by (2)
- diffusion of O2 to the blood
- entry of CO2 from the blood
average alveolar PaO2
103 mmHg
each gram of Hb can combine with ____ mL O2
1.34
what is a-v02 difference
the arteriovenous difference shows the amount of oxygen extracted by tissues
250 ml oxygen a min for men and 200 ml for women
what conditions create the bohr effect
- increased pressured of carbon dioxide
- increased temperature
- decreased pH
- increased 2,3 DPG
what is the bohr effect
a decrease in the amount of oxygen associated with hemoglobin in response to a lowered blood pH
what is 2,3 DPG
- byproduct of glycolysis
- increases with intense exercise and may increase due to training
- binds with Hb and reduces Hb affinity for oxygen
myoglobin can only store ___ iron atom and ___ oxygen molecule
1 & 1
What are the three ways that carbon dioxide is transported
- bound to Hb
- dissolved in plasma (about 5%)
- plasma bicarbonate
what is the haldane effect
Hb interaction with oxygen reduces its ability to combine with carbon dioxide (aids in releasing carbon dioxide in the lungs)
3 factors to increase VO2 during exercise
- right shift of O2 dissociation curve
- decreased tissue PO2
- increased cardiac output
what date did we get ahead of schedule
october 19
