Question

At rest, a person has a heart rate of 70 and a stroke volume of 70. The person begins to run and experience tachycardia, but stroke volume remains the same. What statement can you truthfully make? A) cardiac output would increase

B) heart rate would increase
C) ventricular contraction rate would decrease
D) A and B
E) None of the above

Answer 1

When a person starts to run and experiences tachycardia, their heart rate increases while the stroke volume remains the same. In this scenario, the correct statement is that cardiac output would increase.

Step-by-step explanation:

When a person starts to run and experiences tachycardia, their heart rate increases. However, in this scenario, the stroke volume remains the same. According to the information provided, the person's heart rate at rest is 70 and their stroke volume is also 70. Therefore, the correct statement is that cardiac output would increase. Cardiac output is calculated by multiplying heart rate by stroke volume, so if heart rate increases but stroke volume remains the same, the overall cardiac output will increase.