AAMC FL Practice Exam 2026 – The Comprehensive All-in-One Guide to Exam Success!

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What is the total work generated by a healthy adult circulating 9 L of blood in 10 minutes?

60 kJ

120 kJ

To determine the total work generated by a healthy adult circulating 9 L of blood in 10 minutes, it's essential to consider the relationship between blood flow, pressure, and work. The work done by the heart can be calculated using the formula:

Work = Volume x Pressure

In this case, we know the volume of blood being circulated is 9 liters. To convert this volume into a more standard unit for work calculations, we convert liters to milliliters (1 L = 1000 mL), resulting in 9000 mL.

For the pressure, a typical value for mean arterial pressure in a healthy adult is around 80 mmHg, which can be converted into pascals (1 mmHg = 133.32 Pa), yielding:

80 mmHg * 133.32 Pa/mmHg = approximately 10665.6 Pa.

Now, we calculate the work done in joules using these figures:

Work = 9000 mL x 10665.6 Pa (since 1 mL = 1 x 10^-6 m³, we include this conversion into our calculations)

This leads to a total energy expenditure that can be converted into kilojoules.

In this context, the

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180 kJ

240 kJ

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