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In vivo responses of arterioles and venules to changes in bath calcium concentrations were observed in the cremaster muscle of male Sprague-Dawley rats. Small arterioles (2A, 3A) initially exposed to a solution containing calcium (2.55 mM) significantly dilated in response to a 0-calcium bath. Reexposure to calcium (greater than 0.65 mM) caused 2A and 3A(More)
The in vivo reactivity of small arterioles to norepinephrine and to changes in external calcium was investigated in normotensive (NT) and one-kidney, one-clip Goldblatt hypertensive rats (1K1C). Rats were anesthetized with sodium pentobarbital (50 mg/kg) and arterioles in the cremaster muscle were exposed to increasing concentrations of either(More)
The in vivo responsiveness of small arterioles to the topical administration of two parathyroid hormone fragments was investigated using television microscopy. Male Sprague-Dawley rats were anesthetized with sodium pentobarbital (50 mg/kg) and second- and third-order arterioles in the cremaster muscle were exposed to increasing concentrations (2 X 10(-5) to(More)
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