Cardiac output is the volume of blood pumped by the heart in one minute.
cardiac output=stroke volume×heart rate \text{cardiac output} = \text{stroke volume} \times \text{heart rate} cardiac output=stroke volume×heart rateAt rest, a student has a heart rate of 70 beats per minute and a stroke volume of 75 cm3.
Calculate the cardiac output of the student at rest.
Give the unit.
During exercise, the cardiac output of the student increased to 15 000 cm315\,000\ \text{cm}^315000 cm3 per minute. The heart rate of the student was 150 beats per minute.
Calculate the stroke volume of the student during exercise.
Explain why cardiac output increases during exercise.
42 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.