Multiple Choice
During what phase of the cardiac cycle does blood flow from the ventricles into the pulmonary trunk and aorta?
18. The Heart
Cardiac Cycle
Multiple Choice
What is the cardiac output of a person with a heart rate of 60 beats per minute (bpm) and a stroke volume of 90 mL?
A
6,000 mL/min
B
1,500 mL/min
C
5,400 mL/min
D
3,600 mL/min
Verified step by step guidance1
Step 1: Understand the formula for cardiac output. Cardiac output (CO) is calculated using the formula: CO = Heart Rate (HR) × Stroke Volume (SV).
Step 2: Identify the given values in the problem. The heart rate (HR) is 60 beats per minute (bpm), and the stroke volume (SV) is 90 mL per beat.
Step 3: Substitute the given values into the formula. Replace HR with 60 bpm and SV with 90 mL in the equation CO = HR × SV.
Step 4: Perform the multiplication to calculate the cardiac output. Multiply 60 bpm by 90 mL to determine the total volume of blood pumped per minute.
Step 5: Express the result in the appropriate units. Since stroke volume is given in milliliters (mL), the cardiac output will be expressed in mL/min.
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