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 D
Explanation
Choice A rationale: Hormone therapy (HT) is used to treat menopausal symptoms, not PID.
Choice B rationale: Irregularities in the menstrual cycle is not a common complications of PID.
Choice C rationale: Changes in secondary sex characteristics is not a common complications of PID.
Choice D rationale: Pelvic inflammatory disease (PID) is an infection of the female reproductive organs that can cause scarring and damage to the fallopian tubes, ovaries, and uterus. This can lead to ectopic pregnancy, chronic pelvic pain, and infertility.
Correct Answer is B
Explanation
Choice A rationale: Localization of pain refers to the ability of an individual to pinpoint the exact location of pain, which is different from the described response.
Choice B rationale: Decorticate posturing involves the arms flexing inward toward the body, which is consistent with the observed response to nail bed pressure.
Choice C rationale: Decerebrate posturing involves extension and outward rotation of the arms, which is different from the described response.
Choice D rationale: Flexion withdrawal typically involves pulling away from a painful stimulus, which differs from the specific response observed in the scenario.
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