Concept:The sympathetic nervous system prepares the body for emergency action, often called the “fight-or-flight” response.
Explanation:It increases heart rate, not slows it down.
It decreases saliva secretion, not increases it.
It relaxes the bladder wall so the bladder does not contract.
It causes constriction of most arteries through the release of norepinephrine, which acts on alpha receptors in blood vessel walls.
This constriction raises blood pressure and directs blood to essential organs such as the heart, brain, and skeletal muscles.
Answer:A. constriction of the arteries