( 3 ) yohimbine ( 4 mg / kg ) , a selective a2 - ar antagonist , also partially attenuated the effects of agmatine 门）预先静注眯哩淋受体门r ）和a厂肾上腺素能受体阻断剂（ a厂ar ） idazoxan （ 2
2.
? he pretreatment of ne together with yohimbine , an a , adrenergic receptor antagonist , had no effect on the facilitatory action of capsaicin on neurotransmitter release from primary afferent terminals . this result suggests that the a2 adrenergic receptor on primary afferent terminals might be involved in ne depression on capsaicin - induced neurotransmitter release 将飞型肾上腺素受体阻滞剂育亨宾（ yohimbine ）与ne同时预灌流后， caps对初级传入终末递质释放的易化作用不受影响，提示初级传入纤维终末上的a 。
