Respiratory Gases and Necessity for Breathing Flashcards
what are the two respiratory gases associated with cellular metabolism?
O2
CO2
CO2 reacts with H2O to produce
carbonic acid
accumulation of CO2 casues increased
acidity
what is the process called of oxidation of fuels to generate ATP and heat
cellular respiration
_____ transport is via pulmonary venous return to the left heart and cardiac output from the left heart to the tissues
oxygen
______ transport is via systemic venous return to the right heart and cardiac output from the right heart to the lungs
carbon dioxide
the quantity of the respiratory gases within the blood are expressed in terms of both ____ and ____
content
partial pressure
the concentration (quantity per volume) of respiratory gases within the blood (volume %)
content
reflective of the quantity of O2 or CO2 dissolved within plasma expressed as either mm Hg or cm H2O (units of pressure)
partial pressure
PO2
partial pressure of oxygen
PCO2
partial pressure of carbon dioxide
the dissolved concentration is dependent upon the partial pressure, in conjunction with the solubility of the gas within the liquid (solubility is a physical constant)
henry’s law
Henry’s Law
Cellular metabolism generates a continual tendency to
- ____ O2 from the surrounding interstitial fluid (___ the PO2)
- _____ CO2 into the interstitial fluid (___ the PCO2)
deplete O2
Load CO2
PO2 of the blood ___ PO2 of the interstitial fluid
>
PCO2 of the interstitial fluid ___ PCO2 of the blood
>
the diffusion ___ results from the partial pressure of the dissolved molecules
diffusion force
the diffusion ____ is the difference in partial pressure between blood entering the capillary and the interstitial fluid
diffusion gradient
increased metabolism : _____ O2 in venous blood
decreased
what establishes the diffusion gradient that draws O2 out of the blood
metabolic consumption of O2
what is the partial pressure of CO2 in the blood from tissues
40mmHg
what establishes the diffusion gradient that drives CO2 into the blood
metabolic production of CO2
increased metabolism: ____ CO2 in venous blood
increased
what establishes a dynamic disequilibrium (in terms of PO2 and PCO2) between the interstitial fluid and the systemic arterial blood flowing into the tissues
cellular metabolism