If atherosclerosis reduces the carotid artery lumen diameter, which consequence follows regarding cerebral blood flow regulation?

💡 Explanation

Atherosclerosis reduces vessel diameter, limiting blood flow. Consequently, cerebral autoregulation, which maintains constant cerebral blood flow despite changes in perfusion pressure, becomes less effective and its range narrows because compensatory mechanisms are overwhelmed; therefore, the autoregulation range narrows, rather than causing immediate baroreceptor activation, rapid pressure decrease, or increased venous return.

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