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 D
Explanation
Choice A rationale: Fluoxymesterone is a synthetic forms of testosterone that can worsen BPH by increasing the level of DHT.
Choice B rationale: Danazol is a synthetic forms of testosterone that can worsen BPH by increasing the level of DHT.
Choice C rationale: Methyltestosterone is a synthetic forms of testosterone that can worsen BPH by increasing the level of DHT.
Choice D rationale: Finasteride is a medication that inhibits the conversion of testosterone to dihydrotestosterone (DHT), which is a hormone that stimulates the growth of the prostate gland. By reducing the level of DHT, finasteride can shrink the enlarged prostate and improve urinary symptoms in men with benign prostatic hyperplasia (BPH). The other choices are not appropriate for BPH.
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Correct Answer is D
Explanation
Choice A rationale: This is a sign of worsening diabetes insipidus.
Choice B rationale: This shows signs of overhydration, as urine output is high and specific gravity is high.
Choice C rationale: This is a sign of worsening diabetes insipidus.
Choice D rationale: Vasopressin is a hormone that helps the kidneys retain water and concentrate urine. Diabetes insipidus is a condition where the body does not produce enough vasopressin or does not respond to it, resulting in excessive urination and diluted urine. The goal of vasopressin therapy is to reduce urine output and increase urine concentration, which indicates that the kidneys are functioning properly and the body is hydrated.
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