A woman\'s blood pressure at rest is 125/75. After 30 minutes of exercise, her b

Question

A woman's blood pressure at rest is 125/75. After 30 minutes of exercise, her blood pressure is 190/80.

8. Korotkoff soundsC g. Sounds that are produced when the heart valves close h. Cyclic expansion and contraction of the arteries 9. Pulse 10. A woman's blood pressure at rest is 125/75. After 30 minutes of exercise, her blood pressure is 190/80. a. Calculate her pulse pressure and mean arterial pressure (MAP) at rest and after exercise b. How did her pulse pressure and MAP change after exercise? c. During exercise, why do you think there is a large increase in systolic pressure, but very little change in diastolic pressure?

Explanation / Answer

10) Pulse pressure is the difference between systolic and distolic blood pressures. Mean arterial pressure is the sum of diastolic pressure and one third of pulse pressure.

a) Blood pressure at rest is 125/75 mm Hg. So, pulse pressure is 50 mm Hg and mean arterial pressure is 92 mm Hg.

Blood pressure after exercise is 190/80 mm Hg. So, pulse pressure is 110 mm Hg and mean arterial pressure is 117 mm Hg.

b) Both pulse pressure and mean arterial pressure increase after exercise.

c) During exercise, heart rate increases and heart begins to pump more blood containing oxygen and nutrients to the exercising muscles. Therefore, systolic pressure increases during exercise. Vasodilation results in little change in diastolic pressure.

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