Assertion: parasympathetic nervous system's function | /r/CapableOf | inhibit the release of norepinephrine
Facets:
Source sentences:
text: Activation of α 1 - adrenoceptors in arterioles causes blood-vessel constriction, whereas stimulation of α 2 autoreceptors (receptors located in sympathetic presynaptic nerve endings) functions to inhibit the release of norepinephrine.