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Is this a trick question? One atmosphere gives normal (earth) pressure so the partial pressure would be directly equivelant to the percentage of CO2 in the air you're breathing at that time. Hopefully nil, but if you have a rebreather there will be some or if you are in a small room where you or others have already been breathing there will be some. There will be some in normal air but it should be negligible.
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The PP of CO2 at one atmosphere (at 15C at a pressure of 101325Pa) is 0.0314% of the total pressure, i.e. 14.7PSI in. or roughly 0.004616lbs/sq in. This assumes the diver is (a) on the surface (and doesn't mean 1atm above surface pressure or 29.4PSI or 33ft of sea water) and that his lungs are pressurized to exactly 1 ATM (which may be slightly off if he is holding his breath). This percentage may actually be less with a properly charged and tuned rebreather in that the CO2 scrubbing in the rebreather is intended not to remove all the CO2, but instead to reduce it to the same PP as one would find in a surface air mixture. This is as opposed to an open breathing system which, assuming an air fill and not mixed gasses, will have the same PP-CO2 as surface air and thus needs no adjustment.
This is important because the initial/normal breathing reflex is triggered by serum PP-CO2 (and not as is commonly thought, P-O2). A secondary breathing reflex pattern -- Cheyne-Stoakes respiration triggers off P-O2m but is not normal breathing and is diagnostic of severe CNS insult (i.e. if you're breathing this way you likely aren't conscious and are likely near death). Depleting all CO2 from the breathing source can result in depleted serum CO-2 which in turn fails to trigger the normal breathing reflex, and may result in hypoxia and syncope, resulant in death.
Cjonb 21:30, 2 Jun 2008 (UTC)
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The partial pressure of CO2 in the inhaled air is irrelevant. The CO2 in the lungs does not come from the inhaled air, it comes from the blood, which creates around 40 mm Hg of CO2 in the lungs, about 100 times as much as is present in the atmosphere. This is a physiological norm, essential for maintaining correct pH of the blood, with deviations to either lower or upper side being equally dangerous.
What else can I help you with?
Where is the greatest partial pressure of CO2?
The greatest partial pressure of CO2 is typically found in the alveoli of the lungs, where CO2 is exchanged between the bloodstream and the air we breathe. This is the point where oxygen is taken in and carbon dioxide is released.
How do the structures of alveoli and capillaries support the function of gas exchange?
Exchange of gases in alveoli takes place through diffusion. This diffusion takes place to partial pressure differences among the gases O2 and CO2. The partial pressure of O2in alveolar sac = 103 mm Hg The partial pressure of O2 in blood = 50mm Hg The partial pressure of CO2 in alveolar sac = 28 mm Hg The partial pressure of CO2 in blood = 45 mm Hg As a result, the O2 from alveolar sacs diffuses into blood. the CO2 diffuses from blood into lungs.
Why is the partial pressure of CO2 in your cells high compared to elsewhere?
The high partial pressure of CO2 in cells is due to the fact that cells produce CO2 as a byproduct of metabolism. This CO2 diffuses out of cells into the bloodstream where it is carried to the lungs for removal. In contrast, the environment outside of cells has a lower concentration of CO2, resulting in a concentration gradient that drives the movement of CO2 out of the cells.
NO2 CO2 SO2 is in a bottle the partial pressure of NO2 is 1.25 atm and the partial pressure of CO2 is 2.63 atm if the total pressure of the gases is 11.20 atm what's the partial pressure of SO4?
The partial pressure of SO4 in a bottle of NO2, CO2, and SO2, is 7.32 atm.
What is the difference between pco2 and paco2?
PCO2 refers to the partial pressure of carbon dioxide in the blood, while PaCO2 specifically refers to the partial pressure of carbon dioxide in arterial blood. Arterial blood is the blood that has been oxygenated in the lungs and is then circulated to the rest of the body. The PaCO2 measurement is more precise and important in clinical assessments compared to just PCO2.
What is the partial pressure of CO2 in bar in atmosphere if its concentration is 385 parts per million by volume and the total atmospheric pressure is 14 pis?
To find the partial pressure of CO2 in the atmosphere, first convert the concentration to a decimal fraction: 385 ppm = 0.000385. Then, calculate the partial pressure by multiplying the concentration by the total pressure: 0.000385 * 14 psi = 0.00539 psi. Converting this value to bars gives approximately 0.00037 bar.
What is the partial pressure of oxygen in blood gas a mixture of N2 O2 and CO2 if the partial pr. of Nitrogen 630 mm of Hg and partial pressure of CO2 is 39 mm of Hg?
To find the partial pressure of oxygen, we need to subtract the partial pressures of nitrogen and CO2 from the total pressure of the mixture, which is typically around 760 mmHg at sea level. Therefore, the partial pressure of oxygen would be 760 - 630 - 39 = 91 mmHg.
Does oxygen and other gases enters the nose and travel down to the windpipe but only the oxygen enters the lungs?
When you breathe in through your nose, oxygen along with other gases enter the windpipe and travel to the lungs. In the lungs, oxygen is absorbed into the bloodstream while other gases are exhaled out of the body.
How does one calculate alveolar carbon dioxide partial pressure?
Alveolar carbon dioxide partial pressure can be calculated using the alveolar gas equation: PaCO2 = (Pb-PH2O) * FiCO2 - (PaCO2 / R), where PaCO2 is the alveolar partial pressure of carbon dioxide, Pb is barometric pressure, PH2O is water vapor pressure, FiCO2 is inspired fraction of CO2, and R is the respiratory quotient. This equation helps estimate the partial pressure of CO2 in the alveoli.
Where does gas exchange occur in the lungs?
gaseous exchange in the lungs takes place in the walls of the alveoli which are provided with a rich supply of blood vessels .the partial pressures of the gases .i.e. CO2 and oxygen in the atmosphere and the blood vessel is naturally perfect for the diffusion of gases.
What is the partial pressure of oxygen in a balloon?
The partial pressure of oxygen in a balloon depends on the total pressure inside the balloon and the percentage of oxygen in the air mixture. For example, if the total pressure is 1 atm and the air mixture contains 21% oxygen, then the partial pressure of oxygen would be 0.21 atm.
Which gas law explains why there is as much CO2 exchanged between the alveoli and blood as there is O2 exchanged despite the fact that the partial pressure difference is so much smaller for CO2?
Henry's Law explains that the amount of gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid. As CO2 is more soluble in blood than O2, even though the partial pressure difference is smaller for CO2, more CO2 can be exchanged between the alveoli and blood due to its higher solubility.
