Stem cells are found throughout the human body. Lgr5 $$\({ }^{+}\)$$stem cells are found in the lining of the small intestine. Fig. 2.1 is a flow chart showing stages in the development of one of the daughter cells produced by the mitotic division of an Lgr5 $$\({ }^{+}\)$$stem cell. Fig. 2.1 Fig. 2.2 shows three types of specialised cell that develop from Lgr5 $$\({ }^{+}\)$$stem cells in the small intestine. R Fig. 2.2 The structural features of a cell indicate its likely function. Suggest a function of each of the cells shown in Fig. 2.2, and explain how the structure of each cell supports your suggestion. cell $$\(\mathbf{P}\)$$ function ....................................................................................................................... explanation ........................................................................................................................... ............................................................................................................................................... . ............................................................................................................................................... . cell $$\(\mathbf{Q}\)$$ function ....................................................................................................................... explanation ........................................................................................................................... ............................................................................................................................................... . ............................................................................................................................................... . cell $$\(\mathbf{R}\)$$ function ....................................................................................................................... explanation ........................................................................................................................... ............................................................................................................................................... . ............................................................................................................................................... .

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