Unformatted text preview: change in the 1alpha-B mineralocoritcoid. The experiment showed that there was a “significant decline in plasma osmolarity in the 3 hour test. The 1alpha-B did not change as planned.” Since the original hypothesis did not hold up, a new “tweaked” hypothesis is formed. The newly formulated hypothesis states that the “Plasma 1alpha-B increases when stingrays become hyponatremic.” The levels of the 1alpha-B increase when the salt concentration reaches a certain level, which may be critical for the survival of the animal. In addition to the experiment that was undertaken, Dr. Nunez is able to present background information based upon the experiment. The reason Dasyatis sabina , or Atlantic Stingray, was chosen is from the animals’ ability to be abundant and easily obrained, robust and well adapted to captivity, the wealth of ecological data, and being a euryhaline. All these factors made the Atlantic Stingray the number one choice in Dr. Nunez’s experiments....
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- Spring '09