How do the kidneys regulate blood pressure through their secondary function?
By directly pumping blood to increase blood pressure
By filtering out excess glucose which can affect blood pressure
By producing red blood cells to increase blood volume
By secreting renin which activates the renin-angiotensin-aldosterone system (RAAS)
The Correct Answer is D
A. By directly pumping blood to increase blood pressure:
Only the heart pumps blood. Kidneys regulate fluid balance but do not pump blood.
B. By filtering out excess glucose which can affect blood pressure:
While glucose regulation affects blood vessels, this is not the main mechanism by which kidneys regulate BP.
C. By producing red blood cells to increase blood volume:
Kidneys produce erythropoietin (for RBC production), which can influence BP indirectly, but it's not their primary mechanism.
D. By secreting renin which activates the renin-angiotensin-aldosterone system (RAAS):
This is the correct and primary mechanism. Renin triggers a cascade that results in vasoconstriction and sodium/water retention, raising blood pressure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. BMI 31:
A BMI ≥30 is classified as obesity according to CDC guidelines.
B. BMI 24:
This falls in the normal weight range (18.5–24.9).
C. BMI 28:
This is in the overweight range (25.0–29.9), not obesity.
D. BMI 17:
This is considered underweight, not obese.
Correct Answer is C
Explanation
A. To confirm the placement of the NG tube:
Tube placement should be confirmed by checking pH or x-ray initially, not by measuring residual volume.
B. To remove gastric acid that might cause dyspepsia:
The purpose of checking residual is not to remove acid but to assess tolerance to feeding.
C. To identify delayed gastric emptying:
A high residual volume may indicate that the stomach is not emptying properly, which could lead to aspiration.
D. To determine the client's electrolyte balance:
Electrolytes are checked via blood tests, not by measuring gastric residuals.
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