What's the difference between this cell which I call a committed progenitor cell and its offspring, and the offspring of that offspring.

我所称的定向祖细胞,和它的子细胞之间,还有它子细胞的子细胞之间有什么区别呢

耶鲁公开课 - 生物医学工程探索课程节选

Depending on which cell you are you would call one the 'receptor' and the other the 'ligand'.

这取决于你将哪种细胞上的分子,称为受体,哪种称为配体

耶鲁公开课 - 生物医学工程探索课程节选