Answer:

Correct Answer: A

Solution:

• To find the heart rate, we can use the formula for cardiac output (CO):

[ \text{CO} = \text{Heart Rate (HR)} \times \text{Stroke Volume (SV)} ]

First, we need to calculate the stroke volume (SV), which is the difference between the volume of blood in the ventricles at the end of diastole (EDV) and at the end of systole (ESV):

[ \text{SV} = \text{EDV} - \text{ESV} ] [ \text{SV} = 100 , \text{mL} - 50 , \text{mL} ] [ \text{SV} = 50 , \text{mL} ]

Next, we convert the cardiac output from liters to milliliters:

[ \text{CO} = 5 , \text{L/min} = 5000 , \text{mL/min} ]

Now, we can solve for the heart rate (HR):

[ \text{HR} = \frac{\text{CO}}{\text{SV}} ] [ \text{HR} = \frac{5000 , \text{mL/min}}{50 , \text{mL/beat}} ] [ \text{HR} = 100 , \text{beats/min} ]

So, the heart rate is: