Which of the following best describes the role of osmoreceptors in the regulation of water balance in the body?

Osmoreceptors in the pituitary gland regulate the secretion of cortisol in response to changes in plasma osmolality.

Osmoreceptors in the hypothalamus detect high plasma osmolality and stimulate the release of antidiuretic hormone (ADH), which enhances water reabsorption in the kidneys.

Osmoreceptors in the kidneys monitor blood pressure changes and regulate aldosterone secretion to control sodium reabsorption and water balance.

Osmoreceptors in the hypothalamus detect low plasma osmolality and inhibit the release of antidiuretic hormone (ADH), leading to increased urine production.

Answer and Explanation

The Correct Answer is B

A. Osmoreceptors in the pituitary gland regulate the secretion of cortisol in response to changes in plasma osmolality: This is incorrect as the pituitary gland itself does not have osmoreceptors; rather, the hypothalamus contains osmoreceptors.

B. Osmoreceptors in the hypothalamus detect high plasma osmolality and stimulate the release of antidiuretic hormone (ADH), which enhances water reabsorption in the kidneys: This is correct. Osmoreceptors in the hypothalamus sense changes in plasma osmolality and regulate ADH release to maintain water balance.

C. Osmoreceptors in the kidneys monitor blood pressure changes and regulate aldosterone secretion to control sodium reabsorption and water balance: This is not correct because the kidneys primarily use juxtaglomerular cells to sense blood pressure changes and regulate aldosterone, not osmoreceptors.

D. Osmoreceptors in the hypothalamus detect low plasma osmolality and inhibit the release of antidiuretic hormone (ADH), leading to increased urine production: This is partially correct; osmoreceptors do detect low osmolality, but their inhibition of ADH would decrease urine production, not increase it.

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Correct Answer is B

Explanation

A. Respiratory acidosis is caused by hypoventilation, leading to an increase in carbon dioxide levels in the blood. This condition is characterized by confusion, drowsiness, and headache, but it does not typically present with vomiting, tingling, or slow respirations as described in this scenario.
B. Metabolic alkalosis occurs due to a loss of hydrogen ions or an excess of bicarbonate, commonly caused by prolonged vomiting. The symptoms described, including persistent vomiting, tingling, and slow, shallow respirations, are consistent with metabolic alkalosis.
C. Metabolic acidosis results from the accumulation of acid or loss of bicarbonate, often presenting with rapid, deep breathing (Kussmaul respirations). The client’s slow respirations and other symptoms do not align with metabolic acidosis, making this option less likely.
D. Respiratory alkalosis is caused by hyperventilation, which leads to a decrease in carbon dioxide levels. It is usually associated with rapid breathing and does not match the slow respirations and other symptoms seen in this client.

A. Choice of Analgesia and Sedation B. Assess, Prevent, and Manage Pain C. Delirium: Assess, Prevent, and Manage D. Breathing: Spontaneous Awakening Trials (SAT) and Spontaneous Breathing Trials (SBT)

Correct Answer is D

Explanation

A. The "Choice of Analgesia and Sedation" component of the ABCDEF assessment tool focuses on selecting appropriate pain relief and sedation strategies for the patient but does not directly relate to the weaning process.
B. "Assess, Prevent, and Manage Pain" involves ensuring the patient is comfortable and free from pain, which is important but not specifically related to weaning from the ventilator.
C. "Delirium: Assess, Prevent, and Manage" addresses the cognitive status of the patient, particularly the prevention and management of delirium, which is a critical aspect of care but not directly related to ventilator weaning.
D. "Breathing: Spontaneous Awakening Trials (SAT) and Spontaneous Breathing Trials (SBT)" directly involves the weaning process, as it includes assessing the patient's ability to breathe independently by reducing or removing sedation (SAT) and evaluating their capacity for spontaneous breathing (SBT).

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Which of the following best describes the role of osmoreceptors in the regulation of water balance in the body?

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Correct Answer is B

Explanation

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Correct Answer is D

Explanation

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