What do the parasympathetic and sympathetic divisions have in common?
Answers: Most nerve fibers from both divisions innervate many of the same effectors.
Most nerve fibers from both divisions share the same sites of origin.
The preganglionic nerve fibers in both divisions are of similar length.
The ganglia from both divisions are located in or near visceral organs.Most nerve fibers from both divisions innervate many of the same effectors.
Answers: The sympathetic and parasympathetic divisions both innervate many common smooth muscles, organs, and glands.
Most preganglionic fibers of the parasympathetic system arise from which nerve pair?
Answer: vagus
oculomotor
splanchnic
glossopharyngealvagus
Answer: The heart, lung, liver, gallbladder, pancreas, stomach, and intestines--virtually all of the visceral organs of the thoracic and abdominal cavities--contain ganglia innervated by nerve fibers from the vagus nerves.
A normal response to sympathetic nervous system activation would most likely include the __________.
Answer: inhibition of digestive system activity
decrease in heart rate
increased uptake of glucose from the blood
constriction of bronchiolesinhibition of digestive system activity
Answer: When in an emergency situation, digestion is not a critical body function.
Which structure or organ is innervated exclusively by sympathetic fibers?
iris
arrector pili muscles
gallbladder
heartAnswer: arrector pili muscles
Answer: Arrector pili muscles in the skin are innervated by sympathetic fibers but not parasympathetic fibers.
