These are tiny masses of material,hardened in the lumen of the urinary tubule and are flushed out when filtrate builds up behind them:
A)ketone bodies
B)erythrocytes
C)casts
D)microbes
E)urobilinogen

Question

Quizplus · Accepted Answer

Casts are tiny masses of material that can form in the lumen of the urinary tubule and are made up of cells, protein, or other substances. They can form when filtrate builds up behind them and are flushed out with the urine. Ketone bodies, erythrocytes, microbes, and urobilinogen are not typically associated with the formation of casts in the urinary system.

These Are Tiny Masses of Material,hardened in the Lumen of the Urinary