[{"data":1,"prerenderedAt":65},["ShallowReactive",2],{"q-nurse-106-2-basic-medicine-057":3},{"subject":4,"subjectSlug":5,"subjectFullName":6,"question":7,"related":34,"lastmod":64},"基礎醫學","basic-medicine","基礎醫學(包括解剖學、生理學、病理學、藥理學、微生物學與免疫學)",{"id":8,"webId":9,"year":10,"session":11,"subject":4,"number":12,"stem":13,"options":14,"answer":19,"answerNote":20,"images":21,"explanation":22,"explanationDeep":23,"topics":24,"freq":27},"nurse-106-2-基礎醫學-057","nurse-106-2-basic-medicine-057",106,2,57,"下列抗心律不整藥物，何者可以降低動作電位第四期的去極化，而減少竇房結的自主性？",{"A":15,"B":16,"C":17,"D":18},"quinidine","sotalol","amiodarone","propranolol","D",null,[],"本題考點為抗心律不整藥依動作電位期別的作用。能降低第四期舒張期去極化斜率、減少竇房結自主性者為第二類 β 受體阻斷劑,propranolol 屬此類,選 D。A quinidine 為第一類 A,阻鈉延長動作電位。B sotalol 兼具第二、三類,主延長再極化。C amiodarone 主為第三類延長動作電位時間。三者主要作用於再極化或第零期,非針對竇房結第四期的自主去極化,故錯。","竇房結為節律點,其第四期緩慢去極化(funny current If 與鈣內流)決定心率。交感刺激會加陡第四期斜率、加速放電;β 阻斷劑降低此斜率、延長至閾值時間,故減慢心率與自主性,屬 Vaughan-Williams 第二類。ivabradine 則直接抑制 If。記憶:第四期自主去極化=節律點的『油門』,β 阻斷劑踩煞車。",[25,28,30,32],{"term":26,"count":27},"Vaughan-Williams 第二類",1,{"term":29,"count":27},"β 受體阻斷劑 propranolol",{"term":31,"count":27},"第四期去極化",{"term":33,"count":27},"竇房結自主性",[35,39,44,49,54,59],{"webId":36,"stem":37,"number":38,"year":10,"session":11},"nurse-106-2-basic-medicine-058","下列降血壓藥物中，何者具有血管擴張作用，且臨床上可用於良性前列腺肥大症（BPH）？",58,{"webId":40,"stem":41,"number":42,"year":43,"session":27},"nurse-107-1-basic-medicine-074","回歸熱疏螺旋體（Borrelia recurrentis）在人體引發重覆性的發燒、好轉，主要的原因為何？",74,107,{"webId":45,"stem":46,"number":47,"year":48,"session":27},"nurse-108-1-basic-medicine-008","下列何者的靜脈血，不經由肝門靜脈進入肝臟？",8,108,{"webId":50,"stem":51,"number":52,"year":53,"session":27},"nurse-109-1-basic-medicine-046","下列關於乳癌的敘述何者錯誤？",46,109,{"webId":55,"stem":56,"number":57,"year":58,"session":11},"nurse-110-2-basic-medicine-010","心尖的位置約在左鎖骨中線與第幾肋間的交會處？",10,110,{"webId":60,"stem":61,"number":62,"year":63,"session":11},"nurse-111-2-basic-medicine-044","補體活化啟動一系列的蛋白質水解產生次單位「a」、「b」與其他次單位，具備不同的生物活性。下列何者是補體 C3b 主要的功能？",44,111,"2026-09-04",1788510696668]