How are nephrons, collecting ducts, and collecting tubules related to each other?
A. One collecting duct drains into one nephron, and one nephron drains into one collecting tubule.
B. One nephron drains into one collecting tubule, and several collecting tubules empty into a collecting duct.
C. One nephron drains into one collecting duct, and several collecting ducts empty into a collecting tubule.
D. One nephron drains into several collecting tubules, and all tubules eventually lead to one collecting duct.
E. One collecting tubule drains into one nephron, and several nephrons drain into one collecting duct.
Answer: B
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