객관식
During what phase of the cardiac cycle does blood flow from the ventricles into the pulmonary trunk and aorta?
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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
검증된 단계별 안내1
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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