You are a world-famous muscle physiologist studying the control of smooth muscle in arterioles found in the human kidney. Your preparation includes an intact arteriole placed in an isotonic solution with a supply of glucose and oxygen to keep the tissue alive. Within the controlled bath, you can attach the arteriole to the end of a tube, and you control the pressure of fluid flowing through the tube. As you increase the pressure inside the arteriole, the arteriole constricts reflexively. Which vascular phenomenon does this example illustrate

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