QuestionSBA
QuestionChoice
This is incorrect. Chloride levels are closely linked to sodium levels in the body, and the activation of RAAS tends to increase sodium reabsorption. Consequently, chloride levels also tend to increase in response to RAAS activation.
10026097
c
Cl-
QuestionChoice
This is correct. When the RAAS is stimulated, aldosterone is released. Aldosterone primarily acts on the distal tubules of the kidney, promoting the reabsorption of sodium and the excretion of potassium. This can result in reduced levels of potassium in the bloodstream, a condition known as hypokalaemia.
10026095
a
K+
QuestionChoice
This is incorrect. Activation of RAAS generally leads to increased sodium reabsorption in the distal tubules of the kidney. At the same time, it increases the excretion of potassium, thus leading to hypokalaemia in some cases.
10026096
b
Na+
QuestionChoice
This is incorrect. RAAS activation does not have a direct effect on phosphate levels in the blood. Phosphate regulation primarily occurs through mechanisms involving parathyroid hormone (PTH) and dietary intake, rather than the RAAS.
10026098
d
PO4-
QuestionChoice
This is incorrect. While RAAS indirectly affects calcium levels by promoting the reabsorption of sodium and water, leading to volume expansion, it does not have a direct effect on calcium levels. Calcium regulation is primarily under the control of parathyroid hormone (PTH) and calcitonin.
10026099
e
Ca++
Concept
Chapter
2693
4531
The effect of the renin-angiotensin system on electrolytes
Topic
168
Renal Physiology
17617
A 46 year old woman attends the Emergency Department with reports of severe dizziness that is worse on standing. Her blood pressure is measured at 86/45. The clinician explains that the renin-angiotensin-aldosterone system (RAAS) is activated in response to low blood pressure.

Which of the following electrolytes are reduced by RAAS activation?
a