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 occurs due to hypoventilation, resulting in carbon dioxide retention. This condition is characterized by slow, shallow breathing and confusion, which is not consistent with the client's rapid respiratory rate of 30/min.
B. Respiratory alkalosis is typically caused by hyperventilation, where excessive breathing leads to a decrease in carbon dioxide levels. The client's symptoms of high anxiety and rapid, shallow respirations are indicative of hyperventilation, making respiratory alkalosis the most likely diagnosis.
C. Metabolic acidosis is characterized by deep, rapid breathing (Kussmaul respirations) as the body attempts to expel excess acid. The client's shallow respirations are inconsistent with the breathing pattern seen in metabolic acidosis.
D. Metabolic alkalosis usually presents with symptoms such as dizziness and tingling, often with compensatory slow respirations. The rapid respiratory rate in this case does not suggest metabolic alkalosis, making this option unlikely.

A. Respiratory acidosis B. Metabolic alkalosis C. Metabolic acidosis D. Respiratory alkalosis

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.

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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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Naxlex Comprehensive Predictor Exams

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Correct Answer is B

Explanation

Correct Answer is B

Explanation

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