Which of the following will trigger the renin-angiotensin-aldosterone system (RAAS)into action?
A)low blood pressure
B)parasympathetic nervous system stimulation
C)high levels of sodium ions in the filtrate
D)an increase in systemic blood pressure

Question

Quizplus · Accepted Answer

The renin-angiotensin-aldosterone system is activated when there is low blood pressure, which is sensed by the juxtaglomerular cells in the kidney. This triggers the release of renin, which leads to the production of angiotensin II and ultimately the release of aldosterone, causing vasoconstriction and an increase in blood volume and pressure. Option B is incorrect because the parasympathetic nervous system mainly regulates rest and digest functions, while RAAS is involved in regulating blood pressure. Option C is incorrect because high levels of sodium ions in the filtrate would actually inhibit the release of renin, as sodium ions are important for regulating blood volume and pressure. Option D is incorrect because an increase in systemic blood pressure would not trigger the RAAS, but rather inhibit it to maintain homeostasis.

Which of the Following Will Trigger the Renin-Angiotensin-Aldosterone System (RAAS)into