The increased osmolarity of the filtrate after Bowman's capsule is caused by:

A. diffusion of NaCl out of the proximal
tubule.
B. diffusion of HCO3– out of the proximal
tubule.
C. active transport of NaCl out of the proximal
tubule.
D. active transport of HCO3– out of the
proximal tubule.


C

Biology & Microbiology

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