Exhibit 3-2 Demand curves 
In Exhibit 3-2, the shift in the demand curve from D1 to D2 could have been caused by which of the following?
Definitions:
Peritubular Capillaries
Tiny blood vessels that surround the tubules in the kidney where exchange of substances between the blood and tubules occurs.
Uric Acid
A waste product formed from the breakdown of purines in the body, which is excreted in urine. High levels may lead to gout or kidney stones.
Freshwater Fishes
Fish species that live in bodies of freshwater like rivers, lakes, and ponds, as opposed to saltwater habitats.
Nitrogenous Wastes
Waste products that contain nitrogen, such as urea and ammonia, resulting from the metabolism of proteins.
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