Which type of nephron determines the concentration of the urine?
a. Juxtamedullary
b. Midcortical
c. Cortical
d. Medullary
ANS: A
The juxtamedullary nephrons lie close to and extend deep into the medulla and are important for the concentration of urine. Concentration of urine is not associated with midcortical, cortical, or medullary nephrons.
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