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Edexcel A-Level Biology A2 7.13 Cardiac Output Ventilation and Control Centres Questions

Write the relevant rate equation, convert volumes and time consistently, then trace chemoreceptor input through the medulla to heart or ventilation responses.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
A2

Exam points

  • Calculate cardiac output, stroke volume or ventilation with unit conversions.
  • Explain how carbon dioxide and pH alter heart rate or ventilation through control centres.
  • Interpret exercise data for blood pressure, oxygen uptake and cardiac output.

Edexcel A-Level Biology A2 7.13 Cardiac Output Ventilation and Control Centres Questions question 1

[Maximum number: 7]

Exercise affects the cardiac output of a person.
The graph shows the change in heart rate following exercise for an unfit person and for a fit person.

Figure for Question Edexcel A-Level Biology A2 7.13 Cardiac Output Ventilation and Control Centres Questions question 1 — Edexcel A-Level Biology A2

Question (a)

(a)

Explain the difference in the time it would take for these two individuals to recover from the exercise.

[ 3 ]

Question (b)

(b)

Describe how heart rate is controlled in response to changes in the blood, following exercise.

[ 4 ]
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