A nurse is educating a pregnant client about the renal changes during pregnancy.
Which change is responsible for the increased urinary output?
Decreased glomerular filtration rate.
Increased tubular reabsorption.
Increased renal blood flow.
Increased plasma volume.
The Correct Answer is C
Increased renal blood flow is responsible for the increased urinary output during pregnancy.
This is because the renal plasma flow and glomerular filtration rate increase by 50% to 80% during pregnancy, resulting in more urine production.
Choice A is wrong because the glomerular filtration rate increases, not decreases, during pregnancy.
Choice B is wrong because the tubular reabsorption decreases, not increases, during pregnancy.
This is due to the increased levels of progesterone, which inhibit sodium reabsorption and cause diuresis.
Choice D is wrong because the increased plasma volume is a consequence, not a cause, of the increased renal blood flow.
The plasma volume expands by 30% to 50% during pregnancy to meet the increased metabolic demands of the mother and fetus.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
95 to 105 mmHg.
This is the normal range for PaO2 in pregnancy according to several sources.
PaO2 is the partial pressure of oxygen in arterial blood and reflects the oxygenation of the blood.
It is influenced by factors such as ventilation, perfusion, diffusion, and hemoglobin affinity.
Choice A is wrong because 27 to 32 mmHg is too low for PaO2 and would indicate severe hypoxemia or low oxygen levels in the blood.
Choice C is wrong because 500 to 700 mL is a measure of tidal volume, not PaO.
Tidal volume is the amount of air that moves in and out of the lungs with each breath.
Choice D is wrong because 7 to 10 L/min is a measure of oxygen flow rate, not PaO.
Oxygen flow rate is the amount of oxygen delivered to a patient through a device such as a nasal cannula or a mask.
Correct Answer is C
Explanation
Increased renal blood flow is responsible for the increased urinary output during pregnancy.
This is because the renal plasma flow and glomerular filtration rate increase by 50% to 80% during pregnancy, resulting in more urine production.
Choice A is wrong because the glomerular filtration rate increases, not decreases, during pregnancy.
Choice B is wrong because the tubular reabsorption decreases, not increases, during pregnancy.
This is due to the increased levels of progesterone, which inhibit sodium reabsorption and cause diuresis.
Choice D is wrong because the increased plasma volume is a consequence, not a cause, of the increased renal blood flow.
The plasma volume expands by 30% to 50% during pregnancy to meet the increased metabolic demands of the mother and fetus.
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