Fig. 4.1 depicts a human cell.
(a)[2]
State the name of the cell in Fig. 4.1 and give its principal function.
(b)[4]
Suggest and explain what symptoms could be seen in a person whose number of this cell type is unusually low.
(c)[3]
Explain what would happen to the cell shown in Fig. 4.1 if it were put into pure water.
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