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.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale: Conus medullaris syndrome involves injury or compression to the end portion of the spinal cord and can present with various symptoms but not necessarily lack of normal sympathetic outflow leading to shock.
Choice B rationale: Concussion is a mild traumatic brain injury, and the symptoms described align more with spinal cord injury leading to neurogenic shock.
Choice C rationale: Neurogenic shock occurs due to the loss of sympathetic tone and is characterized by bradycardia, low blood pressure, and vasodilation following spinal cord injury at or above the level of the sixth thoracic vertebra.
Choice D rationale: Diffuse axonal injury typically presents with more widespread brain injury-related symptoms and is not associated with the specific spinal cord-related symptoms described.
Correct Answer is A
Explanation
Choice A rationale: This statement could indicate that the client is receiving too much dose of the medication, which can cause hyperthyroidism. Hyperthyroidism is a condition where the thyroid gland produces too much thyroid hormone, which can speed up the body's metabolism and cause symptoms such as tremors, nervousness, weight loss, increased heart rate, and heat intolerance.
Choice B rationale: More frequent bowel movements could be a normal effect of the medication, as levothyroxine can improve constipation that is often associated with hypothyroidism.
Choice C rationale: The ability to enjoy cold weather might suggest improved tolerance to cold, which would align with normalized thyroid function.
Choice D rationale: This could be a sign of improved well-being and quality of life due to the medication, as levothyroxine can improve fatigue and depression that are often associated with hypothyroidism.
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