In response to pain from injection, the CNS activates the sympathetic nervous system to:
A) Stimulate the adrenal medulla to release serotonin
B) Increase heart rate, blood pressure, and skeletal muscle vasculature
C) Increase mesenteric vessel blood flow to digestive organs
D) Depress the psychological state of a patient

Question

Quizplus · Accepted Answer

The sympathetic nervous system, when activated in response to pain or stress (such as from an injection), works to prepare the body for a "fight or flight" response. This includes increasing the heart rate and blood pressure, as well as redirecting blood flow to the skeletal muscles, away from non-essential systems at that moment, such as the digestive system. This is why option B is correct. Options A, C, and D do not accurately describe the primary functions of the sympathetic nervous system in response to pain.

In Response to Pain from Injection, the CNS Activates the Sympathetic