Activation of the renin-angiotensin-aldosterone system:
Causes albuminuria
Reabsorbs K⁺ and eliminates Na⁺ in the urine
Expands blood volume, increasing blood pressure
Causes hematuria
The Correct Answer is C
A. Causes albuminuria: Albuminuria (protein in urine) is a sign of kidney damage, not a direct effect of RAAS activation.
B. Reabsorbs K⁺ and eliminates Na⁺ in the urine: RAAS does the opposite-it reabsorbs sodium and excretes potassium.
C. Expands blood volume, increasing blood pressure: RAAS activation leads to vasoconstriction and sodium/water retention, which raises blood pressure.
D. Causes hematuria: Hematuria (blood in urine) is typically a sign of trauma, infection, or kidney disease-not directly linked to RAAS.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Pressure within the renal tubules: This is tubular pressure, which opposes filtration and is not the driving force.
B. Blood pressure: Blood pressure within the glomerular capillaries provides the main hydrostatic pressure driving glomerular filtration.
C. Intrathoracic pressure: This affects respiration and venous return, not glomerular filtration.
D. Intraabdominal pressure: Elevated intraabdominal pressure can impair renal perfusion, but it does not drive filtration.
Correct Answer is A
Explanation
A. An increase in GFR increases urine formation: A higher GFR means more plasma is filtered, leading to more urine production.
B. It is not an indication of kidney function: GFR is a primary indicator of kidney function.
C. A decrease in GFR causes polyuria: A low GFR usually leads to oliguria (low urine output), not polyuria.
D. It is unaffected by blood pressure: GFR is directly influenced by blood pressure; low pressure decreases filtration.
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