Noradrenaline-Induced Calcium Inflow Appears not Mediated by Receptor-Operated Calcium Channels in Rat Mesenteric Small Arteries
Activation of vascular smooth muscle requires elevation of the concentration of intracellular free calcium ([Ca2+]i). Calcium may either be released to the cytoplasm from intracellular stores, or it may enter the cytoplasm from the extracellular space via specific membrane channels (28). While large elastic arteries such as the aorta may contract for long periods with only intracellular calcium, the smooth muscle of resistance arteries is greatly dependent on the availability of extracellular calcium (9).
KeywordsCalcium Inflow Resistance Artery Physiological Salt Solution Calcium Entry Blocker Large Elastic Artery
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