Question

What happens to heart rate when blood CO2 concentration increases?

Accepted Answer

- 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

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

Heart Rate Blood Ph Impulses Concentration Increases Dissolved Forms