Renal blood flow and renal perfusion pressure are regulated by two control mechanisms. The first, extrinsic, actually involves a complex interaction of vasomotor effects between opposing neurohormonal systems. The second, intrinsic mechanism, renal autoregulation, depends on changes in afferent arteriolar tone in response to the renal perfusion pressure itself. This article reviews these two mechanisms, how they normally respond to stress, and the clinical implications of certain situations in which these control mechanisms are disrupted.
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Sladen et al. (2000) studied this question.
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