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Figure 4


Fig. 4. Summarized effects of putative transmitters (serotonin, dopamine, norepinephrine, FMRFamide and Leu-enkephalin) at different concentrations (10-6 mol l-1 to 10-9 mol l-1) on ciliary beat frequency (CBF) of the pre-oral cilia. Asterisks indicate significant difference when compared to the respective control groups (P<0.001).