Regulation of Cell Size
Martin Raff Part 1: Regulation of cell growth (ie an increase in cell size rather than cell number) provides an excellent example of a very basic, but poorly understood, question in cell biology. A good lecture for graduate students or senior undergraduates in cell or developmental biology.

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Regulation of Cell Number
Martin Raff Part 2: In this lecture, Raff examines the regulation cell number, rather than cell size, using oligodendrocyte precusor cells as a model system. Also, a good lecture for graduate students or senior undergraduates in cell or developmental biology.