A swimmer’s measurements are shown.
| Condition | Heart rate in beats per minute | Stroke volume in cm3\mathrm{cm^3}cm3 per beat |
|---|---|---|
| Resting | 72 | 65 |
| Training | 150 | 105 |
Use the equation:
cardiac output=stroke volume×heart rate \text{cardiac output}=\text{stroke volume}\times\text{heart rate} cardiac output=stroke volume×heart rateWhat additional volume of blood, in cm3 min−1\mathrm{cm^3\,min^{-1}}cm3min−1, does the swimmer’s heart pump during training compared with resting?
11070
8190
3120
15750
67 exam-style questions on Edexcel GCSE Biology 8.2 Blood and circulation, covering 8.2.1 Structure and function of the blood, 8.2.2 Structure of blood vessels, 8.2.3 Structure of the heart and circulatory system, and 8.2.4 Cardiac output. Each one has a worked solution and a mark scheme showing where the marks go.