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Regulation of Fluid and Electrolyte Balance

In this activity, students explore four specific scenarios in which blood volume and/or blood osmolarity has been perturbed. Students work in teams to predict the effects of these perturbations on urine volume and osmolarity. Students are then provided with a data set showing the urine volume, urine specific gravity, urine chloride, urine color and transparency over a 90 minute time interval. Students work in teams to graph and interpret the data set and compare it to their predictions. They then use their understanding of the factors that regulate hormone release and the subsequent actions of the hormones to explain their data and complete a series of questions. Student teams report their results to the class.

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