8.2 Blood and circulation

H

The table shows measurements before and during exercise.

Table

Condition	Heart rate in beats per minute	Stroke volume in $cm3\mathrm{cm^3}$ per beat
Before exercise	60	80
During exercise	120	100

Use the equation:

\text{cardiac output}=\text{stroke volume}\times\text{heart rate}

What is the percentage increase in cardiac output?

[1]

$50%50\%$

$100%100\%$

$250%250\%$

$150%150\%$

H

The table shows measurements before and during exercise.

Table

Condition	Heart rate in beats per minute	Stroke volume in $cm3\mathrm{cm^3}$ per beat
Before exercise	60	80
During exercise	120	100

Use the equation:

\text{cardiac output}=\text{stroke volume}\times\text{heart rate}

What is the percentage increase in cardiac output?

[1]

$50%50\%$

$100%100\%$

$250%250\%$

$150%150\%$

8.2 Blood and circulation Questions