Final answer:
The sympathetic nervous system responds to pain with increased heart rate, rapid, irregular breathing, elevated glucose levels, and reduced gastrointestinal motility. Blood pressure is typically increased, not decreased, due to vasoconstriction in non-essential body regions.
Step-by-step explanation:
The manifestations of sympathetic stimulation in response to pain include a variety of physiological changes. When the sympathetic nervous system is activated, typically during a stressful or dangerous situation, several responses are triggered to prepare the body for a fight-or-flight scenario. These responses include increased heart rate (1), rapid, irregular breathing (2), and increased glucose levels (3) due to the conversion of glycogen to glucose to provide energy. There is also a decrease in gastrointestinal motility (5) since the body diverts blood flow away from the digestive system to the muscles and critical organs needed for immediate survival. However, contrary to one of the options provided, blood pressure usually increases rather than decreases in response to sympathetic stimulation due to vasoconstriction in non-essential areas, which ensures more blood is available to essential organs and muscles.