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5. A female patient who has had a myocardial infarction asks the nurse why she should not bear down or strain to ensure having a bowel movement. The informs the that this would trigger
A. Vagus nerve stimulation, causing a decrease in heart rate and cardiac contractility.
B. Vagus nerve stimulation, causing and increase in heart rate and cardiac contractility.
C. Sympathetic nerve stimulation, causing an increase in heart rate and cardiac contractility.
D. Sympathetic nerve stimulation, causing a decrease in heart rate and cardiac contractility.