A student suddenly encounters a predator while hiking. Which physiological change is triggered by the activation of the sympathetic nervous system?
Q1. A student suddenly encounters a predator while hiking. Which physiological change is triggered by the activation of the sympathetic nervous system?
Answer: Dilation of pupils
Explanation: The sympathetic system dilates pupils for better vision; the parasympathetic system fails because it causes pupillary constriction and promotes digestion.