AQA · A-Level · Physical Education
Course version: 7582 · Version from Sept 2016
Students should understand the relationship between the cardiovascular and…
Full specification wording
Cardio-respiratory system: Students should understand the relationship between the cardiovascular and respiratory systems and how changes within these systems prior to exercise, during exercise of differing intensities and during recovery allow the body to meet the demands of exercise. They should also understand how taking part in physical activity and sport, as part of a healthy lifestyle, can have a positive effect on these systems.
The cardiovascular and respiratory systems integrate to meet exercise demands.
Checked against the AQA 7582 specification (opens in a new tab) on .
- 4 key terms
Study notes
From the checked teaching notes for this specification point.
The idea
The cardiovascular and respiratory systems integrate to meet exercise demands. Before exercise, an anticipatory rise increases heart rate and ventilation via sympathetic nerve stimulation. During exercise of differing intensities, heart rate and breathing rate increase proportionally to intensity. However, stroke volume and tidal volume increase initially but plateau at submaximal intensities. These changes ensure more oxygen is delivered to working muscles and carbon dioxide is removed. During recovery, heart rate and ventilation decrease gradually to repay oxygen debt. Regular physical activity in a healthy lifestyle induces positive adaptations, like cardiac hypertrophy, enhancing the efficiency of both systems.
What earns the marks
- The cardiovascular and respiratory systems are linked: the heart pumps oxygenated blood to muscles while the lungs oxygenate blood and remove carbon dioxide.
- Before exercise, the anticipatory rise increases heart rate and ventilation via sympathetic stimulation and hormonal release.
- During exercise, heart rate and breathing rate increase proportionally to intensity, while stroke volume and tidal volume plateau at submaximal levels.
- During recovery, heart rate and ventilation decrease gradually as oxygen debt is repaid and waste products are removed.
- Regular physical activity as part of a healthy lifestyle can produce positive adaptations like cardiac hypertrophy and capillarisation.
Common mistakes and how to put them right
Misunderstanding: students think stroke volume and tidal volume increase proportionally up to maximal intensity.
Put it right: Both plateau at submaximal intensities, while heart rate and breathing rate continue to rise.
Misunderstanding: students believe heart rate rises only when exercise starts.
Put it right: The anticipatory rise occurs before exercise begins, due to sympathetic nerve stimulation.
Misunderstanding: students think recovery is passive.
Put it right: Recovery involves active processes such as continued elevated ventilation and heart rate to repay oxygen debt and restore homeostasis.
Exam tips
- Link each system change to its purpose: delivering more oxygen and removing carbon dioxide from working muscles.
- Use correct terminology such as cardiac output, stroke volume, tidal volume and minute ventilation, and ensure units are correct (e.g. dm³·min⁻¹, beats·min⁻¹).
- When answering multiple-choice questions, eliminate options that suggest stroke volume or tidal volume increase linearly to maximum intensity.
Try the lesson
The start of the Cardio-respiratory system: Students should understand the relationship between the cardiovascular and respiratory systems and how changes within these systems prior to exercise, during exercise of differing intensities and during recovery allow the body to meet the demands of exercise. They should also understand how taking part in physical activity and sport, as part of a healthy lifestyle, can have a positive effect on these systems. lesson, made from checked teaching notes for this specification point.
Have a go first
Which change in the respiratory system occurs during exercise so that more oxygen can be taken into the body?
Listen
The cardiovascular and respiratory systems integrate to meet exercise demands. Before exercise, an anticipatory rise increases heart rate and ventilation via sympathetic nerve stimulation. During exercise of differing intensities, heart rate and breathing rate increase proportionally to intensity. However, stroke volume and tidal volume increase initially but plateau at submaximal intensities. These changes ensure more oxygen is delivered to working muscles and carbon dioxide is removed. During recovery, heart rate and ventilation decrease gradually to repay oxygen debt. Regular physical activity in a healthy lifestyle induces positive adaptations, like cardiac hypertrophy, enhancing the efficiency of both systems. A strong answer earns marks for these points. The cardiovascular and respiratory systems are linked: the heart pumps oxygenated blood to muscles while the lungs oxygenate blood and remove carbon dioxide. Before exercise, the anticipatory rise increases heart rate and ventilation via sympathetic stimulation and hormonal release. During exercise, heart rate and breathing rate increase proportionally to intensity, while stroke volume and tidal volume plateau at submaximal levels. During recovery, heart rate and ventilation decrease gradually as oxygen debt is repaid and waste products are removed. A common slip: Misunderstanding: students think stroke volume and tidal volume increase proportionally up to maximal intensity. Instead, both plateau at submaximal intensities, while heart rate and breathing rate continue to rise. Exam tip: Link each system change to its purpose: delivering more oxygen and removing carbon dioxide from working muscles.
Key words
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Integrated cardio-respiratory function
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Anticipatory responses to exercise
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Intensity-dependent exercise responses
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Recovery and homeostatic restoration
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See every definition
- Integrated cardio-respiratory function
- The cardiovascular and respiratory systems are linked, with the heart pumping oxygenated blood to muscles while the lungs oxygenate blood and remove carbon dioxide.
- Anticipatory responses to exercise
- Before exercise, the anticipatory rise increases heart rate and ventilation via sympathetic stimulation and hormonal release.
- Intensity-dependent exercise responses
- During exercise, heart rate and breathing rate increase proportionally to intensity, while stroke volume and tidal volume plateau at submaximal levels.
- Recovery and homeostatic restoration
- During recovery, heart rate and ventilation decrease gradually as oxygen debt is repaid and waste products are removed.
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Test your understanding of Cardio-respiratory system: Students should understand the relationship between the cardiovascular and respiratory systems and how changes within these systems prior to exercise, during exercise of differing intensities and during recovery allow the body to meet the demands of exercise. They should also understand how taking part in physical activity and sport, as part of a healthy lifestyle, can have a positive effect on these systems.
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