EPISODE · Feb 17, 2026 · 24 MIN
2026 選修生物II CH2-2 植物營養器官-根的篇章
from 雷比特生物空中講 · host 雷比特老師
詳細介紹植物根系的複雜結構與多重功能，將其比喻為一個規劃精良的「地下王國」和微觀城市。首先劃分根尖的四個主要功能區，如根冠與分生組織區，接著深入剖析根部的內部解剖學，包括皮層、維管束柱，特別強調吸收水分和養分的機制。最關鍵的部分是闡述內皮層與卡氏帶（Casparian Strip）的守門任務，解釋了物質進入根部核心的兩條路徑（質體外與共質體路徑）。最終說明卡氏帶如何強制物質轉入共質體路徑，從而確保植物能對所吸收的物質進行嚴格篩選與主動調控，展現根部作為智慧型系統的關鍵作用。 聽完後可以自主進行線上測驗，檢視學習成效喔~(需要登入gemini) 測驗網址 https://g.co/gemini/share/997f8fb6b589 Powered by Firstory Hosting
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2026 選修生物II CH2-2 植物營養器官-根的篇章
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