Biology · Chemical Control of Heart Beat
How does an increased concentration of carbon dioxide (CO2) in the blood accelerate the heart rate?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1By decreasing the blood pH, which stimulates chemoreceptors✓
- 2By increasing the blood pH, which stimulates baroreceptors
- 3By directly blocking the sinoatrial (SA) node
- 4By decreasing the concentration of hydrogen ions in the plasma
Correct answer
By decreasing the blood pH, which stimulates chemoreceptors
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