When blood CO2 concentration increases, it forms carbonic acid, lowering pH; chemoreceptors detect this and signal the cardioacceleratory center in the medulla oblongata, which increases heart rate via the sympathetic nerve to remove the CO2.
Quando la concentrazione di CO2 nel sangue aumenta, forma acido carbonico, abbassando il pH; i chemorecettori rilevano questo e inviano impulsi al centro cardioacceleratorio nel midollo allungato, che aumenta la frequenza cardiaca tramite il nervo simpatico per rimuovere il CO2.
| Front | What happens to heart rate when blood CO2 concentration increases? |
|---|---|
| Back | - dissolved CO2 forms carbonic acid - decrease in pH detected by chemoreceptors in carotid arteries and aortic arch - receptors send impulses to cardio acceleratory centre in medulla oblongata - CAC sends more impulses to SA node - via sympathetic nerve - heart rate increases - increased blood flow removes CO2, increasing pH |
Tags: heart_rate
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