Lucy has had a bout of gastroenteritis after ingesting pizza that has been left out in the open for a few days. She has been vomiting for the past three hours, and feels extremely dehydrated. What do we expect will occur to her?

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Answer

Aquaporin channels will be released from their vesicles and fused to the collecting duct luminal membrane.

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Her osmoreceptors, located in the paraventricular and supraoptic nucleus will swell as she is dehydrated.

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Antidiuretic hormone (ADH) secretion will remain the same as this is an acute episode, and thus her urine output will remain the same.

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Lucy will have a decrease in plasma osmolarity due to her extreme dehydration, and her body will try to increase the plasma osmolarity.

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Lucy has had a bout of gastroenteritis after ingesting pizza that has been left ...

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