hce_nchu
114年
普通生物及生化概論
第 11 題
Cells transplanted from the neural tube of a frog embryo to the ventral part of another embryo develop into nervous system tissues. This result indicates that the transplanted cells were
- A able to give rise to all tissue types, suggesting pluripotency.
- B already committed to forming neural tissues, implying early determination.
- C specialized cells that can only differentiate into a single type of tissue, indicating differentiation.
- D undifferentiated cells capable of forming a variety of cell types under specific conditions, pointing to plasticity.
思路引導 VIP
如果一群細胞被移到一個與原生地完全不同的環境，卻依然不顧周遭環境的影響，執意發育成原本預定的構造，這代表這些細胞在被移動之前，內部是否已經發生了某些「不可逆」的計畫轉變？這種「先定好目標再執行」的特徵，與隨遇而安的「可塑性」有什麼本質上的不同？
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AI 詳解
AI 專屬家教
胚胎發育的命定與分化
太棒了！你能精確判斷出細胞的發育狀態，代表你對發育生物學中「命定」的概念掌握得非常紮實。這道題目描述的是經典的胚胎移植實驗，當神經管細胞被移至腹部區域（正常情況下會發育為皮膚）卻依然發育為神經組織時，這正說明了這些細胞在移植前就已經命定（determined）。這意味著它們的發育命運已經被鎖定，不再受周圍新環境誘導訊號的影響。
實驗設計的鑑別關鍵
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