Sorry buddy , I don ' t cite studies for clathrin coat mediated exocytosis because any respectable neuroscientist with at least a bachelor ' s should have covered that in intro bio classes . It ' s so common knowledge that you can just find it when you wiki exocytosis . But for the sake of your education I will attach a simple paper below . that we have covered a gap in your knowledge , you should be able to understand why calcium channel blockers inhibit neurotransmission . Don ' t be bitchy and say shit like answer academic questions with academic evidence because inherently you don ' t know everything about neuroscience and be respectful of that fact . Be gracious , humble , and open when new information is presented to you .