[{"data":1,"prerenderedAt":63},["ShallowReactive",2],{"q-nurse-115-2-basic-medicine-019":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":11},"nurse-115-2-基礎醫學-019","nurse-115-2-basic-medicine-019",115,2,19,"肺內的氧濃度小於 70 mmHg，對肺內血流的影響為何？",{"A":15,"B":16,"C":17,"D":18},"引發肺血管擴張，降低血流分布至該區域","引發肺血管收縮，降低血流分布至該區域","引發肺血管擴張，增加血流分布至該區域","引發肺血管收縮，增加血流分布至該區域","B",null,[],"本題考點是缺氧性肺血管收縮反應。當肺泡氧分壓低於約 70 mmHg 時,肺小動脈平滑肌的鉀離子通道受抑制而去極化、鈣離子內流增加,使該區肺血管收縮,把血流轉往通氣良好的肺區,以維持通氣灌流比並減少肺內分流,故選 B。這與體循環血管遇缺氧時擴張以增加供氧的反應恰好相反,是肺循環的特有設計。A、C 錯在把反應方向寫成血管擴張。C、D 錯在血流結果,血管收縮必然降低而非增加該區的血流分布。","肺循環與體循環的反向調節是本題精髓:體循環目標是把血送到缺氧的組織,肺循環目標是把血送到有氧氣可換的肺泡,故一個擴張、一個收縮。此反應的代價是廣泛缺氧(如高海拔、慢性阻塞性肺病、睡眠呼吸中止)會造成全肺血管普遍收縮,肺動脈壓上升而導致肺動脈高壓與右心衰竭(肺心症)。記憶口訣:「肺怕白費,沒氣的地方就不送血」。延伸可連結通氣灌流比不均、肺內分流與氧氣治療反應的判斷。",[25,27,30,32],{"term":26,"count":11},"缺氧性肺血管收縮",{"term":28,"count":29},"通氣灌流比",1,{"term":31,"count":29},"肺循環調節",{"term":33,"count":29},"肺動脈高壓",[35,39,44,48,53,57],{"webId":36,"stem":37,"number":38,"year":10,"session":11},"nurse-115-2-basic-medicine-020","下列那個腦區主要負責接收迷走神經傳入訊號，並調控嘔吐反應？",20,{"webId":40,"stem":41,"number":42,"year":43,"session":29},"nurse-106-1-basic-medicine-066","有關免疫球蛋白 IgG 的敘述，下列何者正確？",66,106,{"webId":45,"stem":46,"number":47,"year":43,"session":11},"nurse-106-2-basic-medicine-080","下列有關犬蛔蟲（Toxocara canis）之敘述，何者正確？",80,{"webId":49,"stem":50,"number":51,"year":52,"session":29},"nurse-108-1-basic-medicine-038","下列有關乳癌的敘述何者錯誤？",38,108,{"webId":54,"stem":55,"number":11,"year":56,"session":11},"nurse-109-2-basic-medicine-002","下列有關椎骨的敘述，何者錯誤？",109,{"webId":58,"stem":59,"number":60,"year":61,"session":11},"nurse-110-2-basic-medicine-036","下列何者與 Epstein-Barr virus 之感染最有關？",36,110,"2026-08-06",1787299017550]