Fig. 6.

Myogenic constriction of neonatal pig renal interlobular arteries is dependent on L-type voltage-dependent Ca²⁺ channels. A: a trace showing that nimodipine (1 µM) abolished myogenic tone in neonatal pig renal interlobular arteries by blocking L-type Ca²⁺ channels and that the removal of extracellular Ca²⁺ in the presence of nimodipine did not cause any further dilation of the vessels. B: bar graphs summarizing mean data (n = 3) for luminal diameter of neonatal pig interlobular arteries in the presence of nimodipine and nimodipine + Ca²⁺ free/EGTA bath medium.