During exercise, chemoreceptors detect increased CO2 or decreased pH, sending signals to the cardiac center. This results in increased nerve impulses, via the sympathetic nervous system, to the SAN, raising heart rate.
Oefening veroorzaakt een toename van de hartslag. Beschrijf de rol van receptoren en van het zenuwstelsel in dit proces. [4 punten]
| Front | Exercise causes an increase in heart rate. Describe the role of receptors and of the nervous system in this process. [4 marks] |
|---|---|
| Back | 1. Chemoreceptors detect rise in CO2/H+/acidity/carbonic acid/fall in pH OR Baro/pressure receptors detect rise in blood pressure; 2. Send impulses to cardiac centre/medulla; 3. More impulses to SAN; 4. By sympathetic (nervous system for chemoreceptors/CO2) OR By parasympathetic (nervous system for baro/pressure receptors/blood pressure); |
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