Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

eye (iris)

sympathetic: stimulates dilator muscles, dilates eye pupils
parasympathetic: stimulates constrictor muscles, constricts eye pupils

eye (ciliary muscle)

parasympathetic: stimulates ciliary muscles
-results in bulging of the lens for accommodation and close vision

glands (nasal, lacrimal, salivary, gastric, pancreas)

sympathetic: inhibits secretory activity, causes vasoconstriction of blood vessels supplying the glands
parasympathetic: stimulates secretory activity

sweat glands

sympathetic: stimulates copious sweating (cholinergic fibers)

arrector pili muscles attached to hair follicles

sympathetic: stimulates to contract (erects hairs and produces goose bumps)

heart muscle

sympathetic: increases rate and force of heartbeat
parasympathetic: decreases rate, slows and steadies heart

heart: coronary blood vessels

sympathetic: causes vasodilation
parasympathetic: causes vasoconstriction


sympathetic: dilates bronchioles and mildly constricts blood vessels
parasympathetic: constricts bronchioles

digestive tract organs

sympathetic: decreases activity of glands and muscles of digestive system and constricts sphincters
-causes vasoconstriction
parasympathetic: increases motility (peristalsis) and amount of secretion by digestive organs
-relaxes sphincters to allow movement of foodstuffs along tract


sympathetic: epinephrine stimulates liver to release glucose to blood


sympathetic: inhibits activity (gallbladder is relaxed)
parasympathetic: stimulates activity (gallbladder contracts to expel bile)

adrenal medulla

sympathetic: stimulates medulla cells to secrete epinephrine and norepinephrine into bloodstream


sympathetic: causes vasoconstriction, decreases urine output

bladder, urethra

sympathetic: causes relaxation of smooth muscle of bladder wall, constricts urethral sphincter, inhibits voiding
parasympathetic: causes contraction of smooth muscle of bladder wall, relaxes urethral sphincter, promotes voiding


sympathetic: causes ejaculation
parasympathetic: causes erection (vasodilation)


sympathetic: stimulates contraction of smooth muscle of uterine wall, causes vasoconstriction of vessels
parasympathetic: inhibits contraction of smooth muscle of uterine wall, causes vasodilation of vessels

vagina, clitoris

sympathetic: causes contraction of vagina
parasympathetic: causes erection (vasodilation) of clitoris

blood vessels

sympathetic: constricts most vessels and increases blood pressure
-constricts vessels of abdominal viscera and skin to divert blood to muscles, brain and heart when necessary

blood coagulation

sympathetic: increases coagulation

cellular metabolism

sympathetic: increase metabolic rate

adipose tissue

sympathetic: stimulates lipolysis (fat breakdown)

mental activity

sympathetic: increases alertness

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording