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 B
Explanation
Choice A rationale: Adenomas are benign tumors that originate from glandular tissue, such as the endometrium, the inner lining of the uterus.
Choice B rationale: Leiomyomas, also known as fibroids, are benign tumors that arise from the smooth muscle cells of the myometrium, the middle layer of the uterine wall. They are the most common type of uterine tumors, affecting up to 80% of women by age 50. They can cause symptoms such as heavy menstrual bleeding, pelvic pain, pressure, and infertility.
Choice C rationale: Endometriosis is a condition where endometrial tissue grows outside the uterus, causing inflammation and pain.
Choice D rationale: Adenomyosis is a condition where endometrial tissue invades the myometrium, causing enlargement and distortion of the uterus.
Correct Answer is C
Explanation
Choice A rationale: Peptic ulcer disease doesn't typically present with ecchymosis around the umbilicus (Cullen's sign) or significantly elevated amylase and lipase levels.
Choice B rationale: Gastroenteritis is less likely given the specific symptoms, physical exam findings, and laboratory results indicating pancreatic involvement.
Choice C rationale: Acute pancreatitis fits the clinical picture with epigastric pain after heavy alcohol use, persistent nausea/vomiting, tenderness, and elevated amylase and lipase levels.
Choice D rationale: Diverticulitis typically presents with symptoms more localized to the lower abdomen and doesn't cause the characteristic findings seen in this scenario.
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