[{"data":1,"prerenderedAt":65},["ShallowReactive",2],{"q-nurse-111-1-basic-medicine-029":3},{"subject":4,"subjectSlug":5,"subjectFullName":6,"question":7,"related":33,"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":11},"nurse-111-1-基礎醫學-029","nurse-111-1-basic-medicine-029",111,1,29,"下列有關肌節（sarcomere）的明暗帶在肌肉收縮時的敘述，何者正確？",{"A":15,"B":16,"C":17,"D":18},"I band 縮短、H zone 不變","H zone 縮短、I band 不變","I band 及 H zone 皆縮短","H zone 及 I band 皆不變","C",null,[],"本題考點在於肌肉收縮時肌節明暗帶的變化,依滑動纖維學說判斷。收縮時粗、細肌絲互相滑入使肌節縮短:H zone(僅粗肌絲區)因細肌絲滑入而縮短,I band(僅細肌絲區)因與粗肌絲重疊增加而縮短,故 C「I band 及 H zone 皆縮短」正確,為正解。A 錯,I band 縮短沒錯但 H zone 也會縮短而非不變。B 錯,H zone 縮短沒錯但 I band 同樣縮短而非不變。D 錯,兩者在收縮時都會縮短,不會皆不變。唯一保持不變的是 A band(粗肌絲全長),因粗肌絲長度不變,故答案為 C。","滑動纖維學說(sliding filament theory):肌絲本身不縮短,而是細肌絲(actin)被橫橋拉向 M line、滑入粗肌絲(myosin)之間,使肌節整體變短。記憶要訣「A 不變,I、H 縮」——A band=粗肌絲全長恆定;H zone=無重疊的粗肌絲區,收縮時被侵入而縮小;I band=無重疊的細肌絲區,重疊增加而縮短;Z line 彼此拉近。橫橋循環需 ATP 與 Ca²⁺,Ca²⁺ 與旋光素(troponin)結合移開旋轉肌球素(tropomyosin)才露出結合位,是興奮收縮偶聯的核心。",[25,27,29,31],{"term":26,"count":11},"滑動纖維學說",{"term":28,"count":11},"肌節 sarcomere",{"term":30,"count":11},"H zone 與 I band",{"term":32,"count":11},"A band 不變",[34,38,43,48,54,59],{"webId":35,"stem":36,"number":37,"year":10,"session":11},"nurse-111-1-basic-medicine-030","下列何種激素在懷孕過程中不會大量增加？",30,{"webId":39,"stem":40,"number":41,"year":10,"session":42},"nurse-111-2-basic-medicine-046","下列何種細菌不會在吞噬細胞內生存複製，而造成疾病？",46,2,{"webId":44,"stem":45,"number":46,"year":47,"session":42},"nurse-112-2-basic-medicine-040","下列何種青黴素衍生物，可用於治療綠膿桿菌（Pseudomonas aeruginosa）之感染？",40,112,{"webId":49,"stem":50,"number":51,"year":52,"session":53},"nurse-113-3-basic-medicine-038","進行女性不孕症治療療程中，下列何種藥物最適合促進卵巢濾泡成熟？",38,113,3,{"webId":55,"stem":56,"number":57,"year":58,"session":11},"nurse-115-1-basic-medicine-042","下列何種免疫細胞具有吞噬能力，當病原菌入侵人體組織時，可作為抗菌的第一道防線？",42,115,{"webId":60,"stem":61,"number":62,"year":63,"session":42},"nurse-106-2-basic-medicine-056","神經內科病人陳述時常嚴重單側頭痛，確診後為偏頭痛（migraine）。其治療處方為 sumatriptan，可使腦血管收縮，緩解頭痛。此藥物為下列何種自泌素之致效劑（agonist）？",56,106,"2026-09-04",1788510732929]