 The kinetosome mediates movement through a chemical reaction, causing the microtubules to slide against one another and the whole structure to bend.Biologists such as Margulis strongly advocate the use of the name, because of the apparent structural and functional differences between the cilia and flagella of prokaryotic and eukaryotic cells.They argue that the name flagella should be restricted only to prokaryotic organelles, such as bacterial flagella and spirochaete axial filaments.