Partial pressure of carbon dioxide, often used in reference to blood
Carbon dioxide molecule.
pCO2, pCO2, or is the partial pressure of carbon dioxide (CO2), often used in reference to blood but also used in meteorology, climate science, oceanography, and limnology to describe the fractional pressure of CO2 as a function of its concentration in gas or dissolved phases. The units of pCO2 are mmHg, atm, torr, Pa, or any other standard unit of atmospheric pressure. The pCO2 of Earth's atmosphere has risen from approximately 280 ppm (parts-per-million) to a mean 2019 value of 409.8 ppm as a result of anthropogenic release of carbon dioxide from fossil fuel burning. This is the highest atmospheric concentration to have existed on Earth for at least the last 800,000 years.[1]
pCO2, pCO2, or P CO 2 {\displaystyle P_{{\ce {CO2}}}} is the partial pressure of carbon dioxide (CO2), often used in reference to blood but also used in...
water: [NH4]+[NH2COO]− ⇌ CO(NH2)2 + H2O Henry's law states that PCO2=KBxCO2 where PCO2 is the partial pressure of CO2 gas above the solution. KB is Henry's...
direction. Assess relation of pCO2 with pH: If pCO2 & pH are moving in opposite directions i.e., pCO2 ↑ when pH is <7.4 or pCO2 ↓ when pH > 7.4, it is a primary...
air, PCO2 is around 3.5×10−4 atm (or equivalently 35 Pa). The last equation above fixes the concentration of dissolved CO2 as a function of PCO2, independent...
changes in pH and PCO2 (a decrease in pH and an increase in PCO2). The carotid body chemoreceptors are also sensitive to pH and PCO2, but only secondarily...
The factors that determine the values for alveolar pO2 and pCO2 are: The pressure of outside air The partial pressures of inspired oxygen and carbon dioxide...
vessel pH of less than 7.20 and an umbilical artery PCO2 of 66 or higher or umbilical vein PCO2 of 50 or higher. Acid–base homeostasis Acid–base imbalance...
blood gas, the Henderson–Hasselbalch equation is usually quoted in terms of pCO2, the partial pressure of carbon dioxide, rather than H2CO3 concentration...
blood pO2, pCO2, and pH within appropriate physiological ranges. For example, a fall in arterial pO2 (hypoxemia) or an increase in arterial pCO2 (hypercapnia)...
dioxide levels. Under most conditions, the partial pressure of carbon dioxide (PCO2), or concentration of carbon dioxide, controls the respiratory rate. The...
instead of placing the sample in a chamber with a PCO2 of 40 mmHg, the chamber is reset to a PCO2 of 60 mmHg. After equilibration, a new point is reached...
pH, partial pressure of oxygen (pO2), partial pressure of carbon dioxide (pCO2), and bicarbonate (HCO3−) are carefully regulated by a number of homeostatic...
calculate the expected pCO2 in the setting of metabolic alkalosis, the following equations are used: pCO2 = 0.7 [HCO3] + 20 mmHg ± 5 pCO2 = 0.7 [HCO3] + 21...
(HCO3−) and a hydrogen ion (H+). In response to the decrease in intracellular pCO2, more CO2 passively diffuses into the cell. Cell membranes are generally...
with calcite. On emergence, waters degas CO2 due to the lower atmospheric pCO2 (see partial pressure), resulting in an increase in pH. Since carbonate solubility...
evidence, is a drop in atmospheric carbon dioxide levels (pCO2) during the transition. The pCO2 is estimated to have dropped just before the transition...
which regulates the arterial PO2 and PCO2. This homeostatic mechanism prioritizes the regulation of the arterial PCO2 over that of oxygen at sea level. That...
73 °F). Atmospheric CO2 and temperature relations indicate a doubling of pCO2 was accompanied by a ~0.6 °C increase in temperature. The latter warming...
Those individuals with the lowest initial partial pressure of end-tidal pCO2 (the lowest concentration of carbon dioxide at the end of the respiratory...
CO2 at Mauna Loa (in parts per million volume, ppmv; red), surface ocean pCO2 (μatm; blue) and surface ocean pH (green) at Ocean Station ALOHA in the subtropical...
solubility of CO2, yet the pCO2 of the blood of R. pachyptila may be as much as two orders of magnitude greater than the pCO2 of deep-sea water. CO2 partial...
changes primarily in pCO2 and H+ ion concentration. They also sense decrease in partial pressure of O2, but to a lesser degree than for pCO2 and H+ ion concentration...
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