The health care provider is preparing to administer a drug that affects the sympathetic nervous system (SNS). Which one of the following reactions would occur after administration?
a. Increased motility and tone of the urinary bladder
b. A subjective decrease in mental alertness
c. Increased rate and force of myocardial contraction
d. Vasodilatation and bronchoconstriction
ANS: C
The SNS is responsible for the body's "fight or flight" response, which is needed to cope with life's stressors (e.g., fear, extremes of physical activity). In addition, the SNS has two other pri-mary functions: management of the cardiovascular system and regulation of body temperature. Stimulation of the SNS causes the blood pressure and the heart rate to rise, thereby shunting blood to skeletal muscles rather than the gastrointestinal (GI) tract, the kidneys, and the skin. SNS drugs are used primarily for their effects on the heart, blood vessels, and the lungs.
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