During exercise, your cardiac output can increase dramatically in order to meet the metabolic demands of your tissues. If your heart rate increased to 150 beats per minute and the volume of blood pumped per beat is 75 mL, what is your cardiac output?
A) 5 L/min
B) 11.25 L/min
C) 11,250 L/min
D) 50,000 L/min

Question

Quizplus · Accepted Answer

Cardiac output is calculated by multiplying the heart rate by the stroke volume (the volume of blood pumped per beat). 
Cardiac output = heart rate x stroke volume 
In this case, heart rate = 150 beats/min and stroke volume = 75mL/beat 
Cardiac output = 150 x 75 = 11,250 mL/min or 11.25 L/min

During Exercise, Your Cardiac Output Can Increase Dramatically in Order