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The carbon dioxide partial pressure PaCO<sub>2</sub> and the oxygen partial pressure PaO<sub>2</sub> primarily control respiration. Added to this is the pH of the blood, which respiration uses to stay within vital limits. | The carbon dioxide partial pressure PaCO<sub>2</sub> and the oxygen partial pressure PaO<sub>2</sub> primarily control respiration. Added to this is the pH of the blood, which respiration uses to stay within vital limits. | ||
| − | + | Chemoreceptors, nervous stimuli from the lungs, and impulses from the brain help in this process. The blood-brain barrier is permeable to CO<sub>2</sub>, thus receptors can measure the partial pressure of carbon dioxide in the cerebrospinal fluid. From there, respiratory rate is controlled, with carbon dioxide having priority over oxygen. | |
Das heißt, dass '''unsere Atmung grundsätzlich vor allem durch das CO<sub>2</sub> und weniger durch das O<sub>2</sub> im Blut gesteuert wird'''. | Das heißt, dass '''unsere Atmung grundsätzlich vor allem durch das CO<sub>2</sub> und weniger durch das O<sub>2</sub> im Blut gesteuert wird'''. | ||
Version vom 7. März 2022, 06:49 Uhr
The carbon dioxide partial pressure PaCO2 and the oxygen partial pressure PaO2 primarily control respiration. Added to this is the pH of the blood, which respiration uses to stay within vital limits.
Chemoreceptors, nervous stimuli from the lungs, and impulses from the brain help in this process. The blood-brain barrier is permeable to CO2, thus receptors can measure the partial pressure of carbon dioxide in the cerebrospinal fluid. From there, respiratory rate is controlled, with carbon dioxide having priority over oxygen.
Das heißt, dass unsere Atmung grundsätzlich vor allem durch das CO2 und weniger durch das O2 im Blut gesteuert wird.
Only in severe lung diseases the oxygen partial pressure gets a regulating effect, when the PaCO2 is chronically increased and the respiration has adjusted to it. If then the PaO2 is decreased, this also triggers a stimulation of respiration.