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If the total (=atmospheric) gas pressure is 760 mm Hg, then the remaining partial pressure of 760 - (630 + 39) = 91 mm of Hg is for the 3rd gas in blood: Oxygen (O2)
They all enter the lung ... but the only one that quickly enters the blood is oxygen. Because oxygen is the one gas that has a higher partial pressure in "lung air" than its partial pressure in the "lung blood". Note that the blood's CO2 pressure is higher than the air in the lungs, so CO2 comes out of the blood into the lung's air.
PO2 IS THE OYGEN BLOOD LEVEL IN YOUR BODY (More specifically, pO2 is the partial pressure of oxygen in different parts of your body. For example, the partial pressure of oxygen (pO2) is higher in your lungs than it is in various tissues like muscles. Therefore, oxygen is absorbed in the lungs and dispersed through your muscles.)
46 mm Hg
respiratory rate will increase
The normal partial pressure of oxygen in arterial blood is 75-100 millimeters of mercury. In comparison the partial pressure of oxygen at sea level is 750 millimeters of mercury.
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Partial pressure affects the movement of oxygen from the alveoli to the blood because it is the main driving force for oxygen movement in the lungs.Oxygen passes from the air to the fluid within the alveoli, into the cell of the alveoli.
Because of difference in partial pressure
If the total (=atmospheric) gas pressure is 760 mm Hg, then the remaining partial pressure of 760 - (630 + 39) = 91 mm of Hg is for the 3rd gas in blood: Oxygen (O2)
metabolic acidosis
PaO2 is the partial pressure of oxygen in arterial blood. Pa is the abbreviation of partial.
Diffusion only. The partial pressure of O2 is the sole driver.
They all enter the lung ... but the only one that quickly enters the blood is oxygen. Because oxygen is the one gas that has a higher partial pressure in "lung air" than its partial pressure in the "lung blood". Note that the blood's CO2 pressure is higher than the air in the lungs, so CO2 comes out of the blood into the lung's air.
P02 is the partial pressure that oxygen exerts on a vein, artery or any other blood vessel.
Diffusion along the (partial) pressure gradient.
altitude