In Healthy Individuals All of the Following Parts of the Urinary

Question

In healthy individuals all of the following parts of the urinary tract are sterile except:
A)lower folds of the urinary bladder
B)the portion of the urethra closest to the urethral opening
C)the ureter of the kidney
D)nephrons

Accepted Answer

The urethra closest to the urethral opening is not sterile as it can be colonized by bacteria from the surrounding skin, whereas the other parts of the urinary tract have mechanisms to prevent bacterial colonization and maintain sterility.