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If a person's heart rate is 75 beats per minute, what is their cardiac output if
If a person's heart rate is 75 beats per minute, what is their cardiac output if the stroke volume is 70 mL?
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Q1
If a person's heart rate is 75 beats per minute, what is their cardiac output if the stroke volume is 70 mL?
5.25 L/min
4.5 L/min
6.0 L/min
3.0 L/min
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Cardiac output is calculated as heart rate multiplied by stroke volume: 75 beats/min * 70 mL/beat = 5250 mL/min or 5.25 L/min.
Questions & Step-by-step Solutions
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Q
Q: If a person's heart rate is 75 beats per minute, what is their cardiac output if the stroke volume is 70 mL?
Solution:
Cardiac output is calculated as heart rate multiplied by stroke volume: 75 beats/min * 70 mL/beat = 5250 mL/min or 5.25 L/min.
Steps: 7
Show Steps
Step 1: Understand that cardiac output is the amount of blood the heart pumps in one minute.
Step 2: Know the formula for calculating cardiac output: Cardiac Output = Heart Rate x Stroke Volume.
Step 3: Identify the heart rate given in the question, which is 75 beats per minute.
Step 4: Identify the stroke volume given in the question, which is 70 mL per beat.
Step 5: Multiply the heart rate (75 beats/min) by the stroke volume (70 mL/beat).
Step 6: Perform the multiplication: 75 x 70 = 5250 mL/min.
Step 7: Convert the result from mL/min to L/min by dividing by 1000: 5250 mL/min = 5.25 L/min.
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