Which of the following physiologic responses to acute exercise may decrease during pregnancy as compared to the prepregnancy state? Systolic blood pressure. Heart rate. Oxygen uptake. Stroke volume.
Question
Which of the following physiologic responses to acute exercise may decrease during pregnancy as compared to the prepregnancy state? Systolic blood pressure. Heart rate. Oxygen uptake. Stroke volume.
Solution
The physiological response to acute exercise that may decrease during pregnancy as compared to the pre-pregnancy state is Stroke volume.
Here's why:
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Systolic blood pressure: During exercise, systolic blood pressure increases to meet the demand of the working muscles. During pregnancy, blood pressure generally stays the same or might slightly decrease, but it doesn't decrease compared to the pre-pregnancy state.
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Heart rate: Heart rate increases during exercise to pump more blood to the working muscles. During pregnancy, the resting heart rate might increase, but not decrease compared to the pre-pregnancy state.
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Oxygen uptake: Oxygen uptake increases during exercise to meet the increased demand for oxygen in the working muscles. During pregnancy, oxygen uptake might increase due to the increased metabolic demand of the growing fetus, but it doesn't decrease compared to the pre-pregnancy state.
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Stroke volume: Stroke volume is the amount of blood pumped out of the heart with each beat. During exercise, stroke volume increases to pump more blood to the working muscles. However, during pregnancy, stroke volume might decrease due to the increased blood volume and changes in the cardiovascular system. Therefore, stroke volume is the physiological response to acute exercise that may decrease during pregnancy as compared to the pre-pregnancy state.
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