Efek neuroterapi ekstrak air akar Acalypha indica Linn. pada dosis 5 mg dan 10 mg secara eks vivo pada persambungan saraf-otot gastroknemius katak Bufo melanostictus Schneider = Neuro-therapy effect of water extract from the roots of Acalypha indica Linn. in dose of 5 mg and 10 mg in neuromuscular junction of gastrocnemius muscle of frog Bufo melanostictus Schneider ex vivo