Explain how during a game of a rugby, an increase in blood Co2 will cause heart rate to rise (4 marks)
- As the muscles in the body respire and use up the oxygen, Co2 is produced and thus blood acidity in the bloodstream rises
2) This change is detected by the chemoreceptors
3) These impulses are then sent to the Medulla Oblongata in the Cardiac control centre
4) nerve impulses are then sent to the SAN which causes increases sympathetic nervous impulses and thus heart rate rises
TM
Answered by Toby M. • Physical Education tutor
2516 Views
See similar Physical Education A Level tutorsRelated Physical Education A Level answers
All answers ▸What are the stages in the conduction of a cardiac impulse?
Describe the mechanics of breathing for inspiration during exercise. (5)
Describe the mechanics of breathing which cause inspiration at rest. (3)
Outline the process of muscle contraction.