Iris
Parasympathetic: constricts pupils Sympathetic: dilates pupils
ciliary muscle
Parasympathetic: helps lens bulge Sympathetic: flattens lens
glands
Parasympathetic: helps secrete Sympathetic: inhibits secretion
salivary gland
Parasympathetic: stimulates secretion Sympathetic: stimulates thick saliva
sweat glands
Parasympathetic: no innervation Sympathetic: stimulates copious sweating
adrenal medulla
Parasympathetic: no innervation Sympathetic: secretes epinephrine and norepinephrine
arrector pili muscles
Parasympathetic: no innervation Sympathetic: stimulates goosebumps
heart (muscle)
Parasympathetic: decreases heart rate Sympathetic: increases heart rate
heart (blood vessels)
Parasympathetic: no innervation Sympathetic: contracts vessels
bladder/urethra
Parasympathetic: promotes voiding Sympathetic: inhibits voiding
lungs
Parasympathetic: constricts bronchioles Sympathetic: dilates bronchioles
digestive tract organs
Parasympathetic: relaxes sphincter Sympathetic: constricts sphincters
liver
Parasympathetic: increases glucose uptake Sympathetic: releases glucose into the blood
gallbladder
Parasympathetic: excites Sympathetic: inhibits
kidney
Parasympathetic: no effect Sympathetic: promotes renin release
penis
Parasympathetic: causes erection Sympathetic: causes ejaculation
vagina/clitoris
Parasympathetic: vaginal lubrication and clitoral erection Sympathetic: causes vagina to contract
blood coagulation
Parasympathetic: no innervation Sympathetic: increase coagulation
cellular metabolism
Parasympathetic: no innervation Sympathetic: increases metabolism
adipose tissue
Parasympathetic: no innervation Sympathetic: stimulates fat breakdown