[{"data":1,"prerenderedAt":63},["ShallowReactive",2],{"q-nurse-112-1-basic-medicine-014":3},{"subject":4,"subjectSlug":5,"subjectFullName":6,"question":7,"related":34,"lastmod":62},"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-112-1-基礎醫學-014","nurse-112-1-basic-medicine-014",112,1,14,"骨骼肌（skeletal muscle）的收縮過程中，鈣離子是與下列何者結合？",{"A":15,"B":16,"C":17,"D":18},"旋轉素（troponin）","肌動蛋白（actin）","旋轉肌凝素（tropomysin）","攜鈣素（calmodulin）","A",null,[],"本題考點在於骨骼肌收縮時鈣離子的結合對象。依橫橋循環機轉，動作電位使肌漿網釋放鈣離子，鈣與旋轉素（troponin，肌鈣蛋白）的TnC次單位結合，導致旋轉肌凝素（tropomyosin）位移、露出肌動蛋白上的結合位，肌凝素頭部才能與肌動蛋白形成橫橋，故鈣直接結合的是旋轉素，選A。B肌動蛋白（actin）是被露出結合位以供肌凝素附著者，非鈣的直接結合對象；C旋轉肌凝素是被旋轉素構型改變推移者，鈣不直接與其結合；D攜鈣素（calmodulin）是平滑肌的鈣結合蛋白，非骨骼肌所用。考點在於辨識骨骼肌用troponin、平滑肌用calmodulin。","興奮-收縮偶聯：AP沿T小管→肌漿網釋Ca²⁺→Ca²⁺結合troponin-C→tropomyosin移位→actin結合位露出→myosin橫橋形成、ATP水解拉動→肌絲滑動。骨骼肌與心肌靠troponin；平滑肌無troponin，改由Ca²⁺-calmodulin活化肌凝素輕鏈激酶(MLCK)。這是常考的骨骼肌vs平滑肌調控差異。",[25,28,30,32],{"term":26,"count":27},"旋轉素troponin",2,{"term":29,"count":11},"骨骼肌興奮收縮偶聯",{"term":31,"count":11},"鈣離子",{"term":33,"count":11},"肌絲滑動理論",[35,39,44,49,53,58],{"webId":36,"stem":37,"number":38,"year":10,"session":11},"nurse-112-1-basic-medicine-015","作夢通常發生於那一個睡眠階段？",15,{"webId":40,"stem":41,"number":42,"year":10,"session":43},"nurse-112-3-basic-medicine-011","細胞膜外側表面的盞醣（glycocalyx）最主要的功能為何？",11,3,{"webId":45,"stem":46,"number":47,"year":48,"session":27},"nurse-113-2-basic-medicine-005","尿道外括約肌（external urethral sphincter）位於：",5,113,{"webId":50,"stem":51,"number":43,"year":52,"session":43},"nurse-114-3-basic-medicine-003","以形狀分類，髕骨（patella）屬於下列何種骨頭？",114,{"webId":54,"stem":55,"number":56,"year":57,"session":11},"nurse-106-1-basic-medicine-057","下列有關新型抗凝血藥物 Argatroban 的敘述，何者正確？",57,106,{"webId":59,"stem":60,"number":42,"year":61,"session":27},"nurse-107-2-basic-medicine-011","腎臟（kidney）的何部位具有腎絲球（glomerulus）的構造？",107,"2026-09-04",1788510740581]