ADH release from the posterior pituitary is stimulated by which process?
Low blood pressure sensed by baroreceptors in the kidneys.
Low osmolality sensed by osmoreceptors in the kidneys.
High plasma osmolarity sensed by osmoreceptors in the hypothalamus.
High concentration of potassium sensed by chemoreceptors in the carotid body.
The Correct Answer is C
Choice A rationale: Low blood pressure sensed by baroreceptors in the kidneys would stimulate the renin-angiotensin-aldosterone system, which regulates blood pressure and sodium balance.
Choice B rationale: Low osmolality sensed by osmoreceptors in the kidneys would
indicate that the body has excess water and needs to excrete it, which would inhibit ADH release.
Choice C rationale: ADH, or antidiuretic hormone, is a peptide hormone that regulates the water balance in the body. It is released from the posterior pituitary gland in response to signals from the hypothalamus. When the plasma osmolarity, or the concentration of solutes in the blood, is high, it means that the body is dehydrated and needs to conserve water. The osmoreceptors in the hypothalamus detect this change and stimulate the release of ADH, which acts on the kidneys to increase water
reabsorption and decrease urine output. This helps to lower the plasma osmolarity and restore the water balance.
Choice D rationale: High concentration of potassium sensed by chemoreceptors in the carotid body would affect the acid-base balance and respiratory rate, but not ADH
release.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale: This instruction helps to promote airflow and prevent moisture accumulation, aiding in vaginitis recovery.
Choice B rationale: Yogurt with live cultures containing lactobacilli can actually help restore the natural balance of bacteria in the vagina and can be beneficial for some types of vaginitis.
Choice C rationale: Oral contraceptives are not a treatment for vaginitis and do not impact the condition.
Choice D rationale: Douching can disrupt the vaginal pH and natural bacterial balance, potentially exacerbating vaginitis.
Correct Answer is C
Explanation
Choice A rationale: Typically associated with potassium depletion rather than elevated levels.
Choice B rationale: Furosemide, a loop diuretic, can cause potassium depletion leading to hypokalemia, but it might also cause transient elevations in potassium levels initially. Choice C rationale: Addison disease can cause hyperkalemia, or high potassium, due to decreased renal excretion of potassium and increased retention of sodium and water.
Choice D rationale: Cushing disease can cause hypokalemia, or low potassium, due to increased renal excretion of potassium and decreased reabsorption of sodium and water.
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