these traps may be active or passive, depending on whether movement aids the capture of prey. for example, "triphyophyllum" is a passive flypaper that secretes mucilage, but whose leaves do not grow or move in response to prey capture. meanwhile, sundews are active flypaper traps whose leaves undergo rapid acid growth, which is an expansion of individual cells as opposed to cell division. the rapid acid growth allows the sundew tentacles to bend, aiding in the retention and digestion of prey.