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: Intubation and mechanical ventilation may be needed if the respiratory muscles are affected by GBS, but this is not a routine intervention at this stage.
Choice B rationale: One of the main treatments of GBS is IV immunoglobulin therapy (IVIG), which involves infusing antibodies from donated blood plasma to block the harmful immune response that damages the nerves. Sandoglobulin is one of the brand names of IVIG used for GBS. IVIG can help shorten the duration and severity of the disease, and improve the recovery rate.
Choice C rationale: Methylprednisolone is a corticosteroid that can reduce inflammation, but it is not recommended for GBS, as it may worsen the condition or increase the risk of infection.
Choice D rationale: NG feeding tube may be required if the patient has difficulty swallowing, but this is also not a standard intervention at this time.
Correct Answer is A
Explanation
Choice A rationale: This patient is likely experiencing hyperosmolar hyperglycemic state (HHS). Rapid administration of IV fluids is crucial to correct severe dehydration associated with HHS.
Choice B rationale: Routine insulin therapy and exercise might be components of diabetes management but wouldn't directly address the immediate concern of severe dehydration and high blood glucose.
Choice C rationale: Cardiac monitoring for potassium changes might be necessary but isn't the primary immediate intervention for HHS.
Choice D rationale: Administering a different antibiotic for the UTI is incorrect, because there is no evidence that the current antibiotic is ineffective or causing adverse effects. The UTI may have triggered the HHS, but it is not the main problem that needs to be addressed urgently.
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