[{"data":1,"prerenderedAt":67},["ShallowReactive",2],{"q-nurse-115-2-basic-medicine-012":3},{"subject":4,"subjectSlug":5,"subjectFullName":6,"question":7,"related":37,"lastmod":66},"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-115-2-基礎醫學-012","nurse-115-2-basic-medicine-012",115,2,12,"肌肉收縮的滑動絲（sliding filament）模型描述的是那兩種蛋白間的交互作用？",{"A":15,"B":16,"C":17,"D":18},"肌鈣蛋白（tropoin）和原肌球蛋白（tropomyosin）","肌動蛋白（actin）和肌球蛋白（myosin）","肌球蛋白（myosin）和鈣離子","肌鈣蛋白（tropoin）和鈣離子","B",null,[],"本題考點是骨骼肌收縮的滑動絲學說。該模型指出收縮時肌絲本身長度不變,而是粗肌絲上肌球蛋白的頭部與細肌絲的肌動蛋白形成橫橋,反覆結合、擺動、脫離,把細肌絲往肌小節中央拉近,使肌小節縮短而產生張力,故交互作用的兩種蛋白是肌動蛋白與肌球蛋白,選 B。A 肌鈣蛋白與原肌球蛋白屬調節蛋白,負責遮蔽或露出結合位,本身不互相拉動。C、D 中的鈣離子是啟動訊號,鈣與肌鈣蛋白結合後造成構型改變才讓橫橋得以形成,但鈣離子並非構成滑動絲的收縮蛋白。","把肌小節內的四種蛋白分成兩組最好記:收縮蛋白=肌動蛋白+肌球蛋白(負責出力),調節蛋白=肌鈣蛋白+原肌球蛋白(負責開關)。橫橋循環需要 ATP 兩次參與——水解供頭部擺動、結合使頭部脫離,這正是死後僵直的原因:ATP 耗盡後橫橋無法解開。收縮時 H 帶與 I 帶變窄而 A 帶寬度不變,是判讀肌小節示意圖的固定考點。延伸可連結重症肌無力(神經肌肉接合處受體異常)與低血鈣造成的肌肉痙攣。",[25,28,30,33,35],{"term":26,"count":27},"橫橋循環",3,{"term":29,"count":11},"滑動絲學說",{"term":31,"count":32},"肌動蛋白",1,{"term":34,"count":32},"肌球蛋白",{"term":36,"count":32},"肌鈣蛋白",[38,42,47,51,56,61],{"webId":39,"stem":40,"number":41,"year":10,"session":11},"nurse-115-2-basic-medicine-013","自律神經系統的副交感神經節後神經元（postganglionic parasympathetic neuron）所分泌的神經傳遞物質為何？",13,{"webId":43,"stem":44,"number":45,"year":46,"session":32},"nurse-106-1-basic-medicine-059","Dextromethorphan 之臨床用途為：",59,106,{"webId":48,"stem":49,"number":50,"year":46,"session":11},"nurse-106-2-basic-medicine-073","關於病毒逃避免疫攻擊的機制，下列敘述何者錯誤？",73,{"webId":52,"stem":53,"number":54,"year":55,"session":32},"nurse-108-1-basic-medicine-031","關於碳水化合物消化和吸收的敘述，下列何者正確？",31,108,{"webId":57,"stem":58,"number":59,"year":60,"session":32},"nurse-109-1-basic-medicine-075","下列病毒的散播，何者不經病媒蚊媒介？",75,109,{"webId":62,"stem":63,"number":64,"year":65,"session":11},"nurse-110-2-basic-medicine-029","有關表面作用劑（surfactant）敘述，下列何者錯誤？",29,110,"2026-08-06",1787299017480]