Under normal conditions, the renin-angiotensin system functions by:
A) dilating the systemic vasculature and reducing cardiac afterload when arterial blood pressure increases.
B) stimulating alpha-1 receptors, thereby increasing the blood pressure in response to acute blood loss.
C) blocking alpha-2 receptors, thereby increasing the release of norepinephrine and raising blood pressure.
D) promoting vasoconstriction and fluid retention in response to hypotension or hypoperfusion.
Answer: D) promoting vasoconstriction and fluid retention in response to hypotension or hypoperfusion.
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