alleryStart learning →Collecting ducts merge in the medulla to form roughly how many terminal ducts emptying at a papilla?
AAbout 3 terminal ducts
BAbout 300 terminal ducts
CAbout 130 terminal ducts
DAbout 30 terminal ducts
Answer & Solution
Correct answer: D. About 30 terminal ducts
1. Each collecting duct gathers forming urine from several nephrons.
2. As they descend deeper into the medulla they merge with one another.
3. About 30 terminal ducts result, and these empty at a papilla into the calyces.
4. A figure of three would be far too few to drain 1.3 million nephrons per kidney.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 25 "The Urinary System", section 25.4 Microscopic Anatomy of the Kidney_
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