When an extracellular signal activates phospholipase activity within cells, how quickly can they produce and release their downstream products? For e.g. when PLA2 is activated, how quickly can the cell produce and release arachidonic acid? Same for PLD, how quickly after activation could you expect the production of phosphatidic acid and DAG etc.? I am studying intercellular signalling pathways that appear to be mediated by the activation of these phospholipases, but I am not sure whether the time-frame within which I see their effects really fits with their activation.