During a mountain climb, a 23-year-old hiker loses a foothold and falls several feet. He is not seriously injured, but he does lose his backpack. He walks for 8 hours in the heat without water, and by the time he reaches a shelter, he is extremely thirsty. Which of the following nephron segments' fluid is most likely to be hypoosmotic in this individual? 
Definitions:
Unit Costs
The cost incurred by a company to produce, store, and sell one unit of a particular product or service.
Diseconomies Of Scope
A situation where the cost of producing multiple products or services together is higher than producing them separately.
Economies Of Scope
Cost advantages that enterprises obtain due to a broader scope of operations or increased production diversity.
Economies Of Scope
Cost advantages that a business experiences by producing a variety of products rather than specializing in a single product or service.
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