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What is PaCO2?
The concentration of Carbon Dioxide in arterial blood. Partial (Pa) Carbon Dioxide (CO2) pressure in ABG.
What are the atmospheric gases of earth?
78% nitrogen, 21% oxygen, 0.9% argon, 0.03% carbon dioxide
How does the ocean act like a sink for carbon dioxide?
Atmospheric carbon dioxide dissolves in the water close to the surface of the ocean. As the amount of carbon dioxide in the atmosphere increases, therefore, so does the concentration of carbon dioxide in these surface waters. Most of the absorbed carbon is accommodated by chemical reactions between the water and carbon dioxide . But this 'buffering' capacity has limits and - if this water remains at the surface - it eventually becomes saturated with carbon dioxide. Surface water and deep water, however, are slowly but constantly overturning in a cycle of about 1000 years. As the surface waters move downwards - a process that occurs mainly in the North Atlantic and Southern oceans - it carries dissolved carbon dioxide down with it. As a result, about 75 per cent of the carbon that has been absorbed by the ocean since human activities began releasing carbon dioxide now resides in deeper waters. Overall, therefore, this process has recently been working as an important sink for carbon produced by human activity. Such downward transport, however, is relatively slow, and so it is ocean circulation - and not dissolution of carbon dioxide in surface waters - that limits carbon dioxide uptake by the oceans. Furthermore, models of the movement of oceanic water masses predict that in a warmer climate the sinking of surface water, and hence burial of carbon dioxide, will slow down, reducing the future role of the ocean as a carbon sink. Another way that the oceans absorb carbon is through the action of microscopic marine plants. When these organisms die, their bodies sink into deeper water. Although most of the carbon in the organisms decomposes to carbon dioxide before reaching the ocean floor, it is prevented from escaping back to the atmosphere (at least, until the oceans turn over). This biological uptake of carbon will probably increase in future, as changes in sea surface temperatures and chemistry lead to an increase in the growth of algae. But it will not be enough, however, to compensate for the reduced downward transport of water and dissolved carbon, and hence is unlikely prevent the overall ocean sink diminishing in the future. Inedeed sinks will probably never lead to a decrease in atmospheric carbon dioxide whilst carbon dioxide emissions continue at their current level. Hope It Helped! ----------------------------------------------HomeworkHelper-----------------------------------------------------
What are some health and environmental hazards of carbon dioxide?
There are no health hazards from breathing carbon dioxide in the atmosphere, but breathing pure carbon dioxide will kill you. The environmental hazard from carbon dioxide is that it is one of the greenhouse gases that is causing global warming.
Which gas is about 60 times more plentiful in the ocean than in the atmosphere?
Carbon dioxide
What varibles has the least direct effect on the rate of an enzyme-regulated reaction?
Carbon Dioxide concentration
What is rapidly returned to the atmospheric reservoir when humans burn fuels?
Carbon dioxide (CO2) is rapidly returned to the atmospheric reservoir when humans burn fuels. This process contributes to the greenhouse effect and global warming by increasing the concentration of CO2 in the atmosphere.
Carbon dioxide in atmospheric air amounts to about?
Carbon dioxide in atmospheric air typically amounts to about 0.04%.
Does the exchange of carbon dioxide depend on the concentration of oxygen in the alveoli and the blood?
Yes, the exchange of carbon dioxide in the alveoli and blood is dependent on the concentration of oxygen. Oxygen molecules bind to hemoglobin in red blood cells, allowing for the release of carbon dioxide from the blood into the alveoli for exhalation. This process is regulated by the body to maintain a balance of oxygen and carbon dioxide levels.
What might decrease global atmospheric carbon dioxide?
There is no known way that humans can economically remove carbon dioxide from the atmosphere; all we can really do is reduce our emissions of carbon dioxide and slow down the rate at which atmospheric carbon dioxide levels are increasing. The surface waters of the ocean do absorb some carbon dioxide from the atmosphere as atmospheric carbon dioxide level increase, but there is little interchange betwen the warm upper ocean and the deep layers. However over a period of several thousand years, there is sufficient interchange to absorb large volumes of carbon dioxide, allowing the atmospheric concentration to return more or less to normal. Afforestation. Planting trees will remove carbon dioxide from the atmosphere.
Is it true that increased levels of atmospheric carbon dioxide are largely due to the increased amount of aerobic respiration by plants and animals?
No. This is part of the carbon cycle, which is a closed system and does not increase or reduce the atmospheric concentration of carbon dioxide. The only way to increase the level of atmospheric carbon dioxide is to bring carbon from outside that system. Volcanic eruptions can add a relatively small amount, but the main source of new carbon is from burning fossil fuels, such as coal, oil and natural gas.
What Large amounts of atmospheric carbon dioxide are absorbed by what?
The ocean absorbs large amounts of atmospheric carbon dioxide, and is acidified thereby.
What is the relationship between the rise of ocean temperatures and the rise in the level of atmospheric carbon dioxide?
The relationship between the rise of ocean temperatures and the rise in the level of atmospheric carbon dioxide is that when there is a rise in atmospheric carbon dioxide the warmer the temperature of the ocean is
What is an increase in the atmospheric levels of carbon dioxide is the biggest contributor?
An increase in the atmospheric levels of carbon dioxide is the biggest contributor to global warming.
What are large amounts of atmospheric carbon dioxide absorbed by?
The ocean absorbs large amounts of atmospheric carbon dioxide, and is acidified thereby.
Why has the concentration of carbon dioxide in the air changed?
The concentration of carbon dioxide in the air has increased primarily due to human activities such as burning fossil fuels, deforestation, and industrial processes. These activities release carbon dioxide that was previously stored in Earth's geological deposits into the atmosphere, leading to an accumulation of the gas over time. This increase in carbon dioxide contributes to global warming and climate change.
How does the burning of fossil fuels contribute to the net increase in atmospheric carbon?
Burning fossil fuels releases carbon dioxide into the atmosphere. This carbon dioxide acts as a greenhouse gas, trapping heat and leading to an increase in global temperatures. This contributes to the net increase in atmospheric carbon levels, as it adds to the overall concentration of greenhouse gases in the atmosphere.
