Cardiac system TypeIt

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There are gaps in the passage below. See if you can fill in the gaps by typing the correct answer into the fields. Check your answers by clicking on the button below. You need to fill in all of the empty fields before you can check your answers. You have three attempts to get all the answers right, but answering each one correctly first time will get you more marks! The pass mark is 69%.

It is useful for an athlete to be able to monitor the health and effectiveness of their heart. To do so, several measurements of the heart can be made; these are: heart rate, stroke volume and cardiac output. You will need to know how to measure or calculate each of these. Let's explore these further below.

  • Heart rate – the number of times the heart per
  • Stroke volume – the of blood ejected from the per
  • Cardiac output – the volume of blood ejected from the in

This can be summarised with the following equation:

    = × stroke volume

During exercise, these values change in order to meet the demands of exercise. Heart rate linearly with exercise intensity. Increasing heart rate also increases the cardiac output as the heart is pumping more blood per . Stroke volume also increases as the heart is working harder to pump out more blood per . This, in turn, also increases the . Before exercise begins, the heart rate also increases as a physiological response in preparation for exercise. This is called .

This is your 1st attempt! You get 3 mark(s) for each one you get right. Good luck!