Going back to the carbon dioxide regulation, the
Medulla Oblongata, a sector of the brain that controls autonomous reactions in
the body, is responsible for monitoring the carbon dioxide levels and pressure.
Once the medulla oblongata sees retention of carbon dioxide past normal
pressures, the medulla oblongata activates respiratory reflex loops. This will
in turn lead to inspiration to restore the balance or homeostatic conditions of
the arterial blood gasses. The chemoreceptors that are controlled by the
Medulla oblongata are indeed Carbon dioxide chemoreceptors. It is generally
stated that since the medulla oblongata is bathed in carbon dioxide, it is able
to use the carbon dioxide chemoreceptors within that specific area to easily
monitor the transitory carbon dioxide levels. The medulla oblongata tracks the
gas levels in order to make sure that acidity will be controlled. Acidity in
the body is important because of the sole reason that the acids and bases in
the body retain the ability to control all metabolic activities in the body. (A.C.F.A.S.P.
2009, p 2)
Note that the information here pertains to the normal Carbon Dioxide regulation and not through Chemoreception of peripheral chemoreceptors. There is a big difference as there is a Medulla Oblongata for normal CO2 regulation
Here is a picture of the Human upper body. The Medulla Oblongata is just under the brain and is where the regulation occurs with our primary carbon dioxide regulatory system( respiratory system).
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