Cardiac output

Question 1

Cardiac output (CO) is the term used to describe

Answer 1

the volume of blood that is pumped by the heart (the left and right ventricle) per unit of time

Question 2

Individuals who are fitter often have higher cardiac outputs

Answer 2

higher cardiac outputs due to having thicker and stronger ventricular muscles in their hearts

Question 3

Cardiac output increases when an individual is

Answer 3

is exercising
This is so that the blood supply can match the increased metabolic demands of the cells

Question 4

Heart rate is the

Answer 4

how many times the heart beats a min

Question 5

Stroke volume is the

Answer 5

volume of blood pumped out of the left ventricle during one cardiac cycle

Question 6

Cardiac output is found by

Answer 6

Cardiac output = heart rate x stroke volume

Question 7

1 dm3 is equal to

Answer 7

1000 cm3.

Question 8

1 dm3 is equal to 1000 cm3. It can be useful to convert all the figures found in the question into the same units before starting your workout, that way you are less likely to make any mistakes!

Most cardiac cycle graphs show the changes in pressure in the left ventricle, left atrium and aorta.

Remember that in order to work out the stroke volume you need to know the change in volume, not the change in pressure!