Question

urine production takes place in the:
a nephrons.
b bladder.
c ureter.
d renal pelvis.

Explanation:

Nephrons are the functional units of the kidneys. They filter blood, reabsorb useful substances, and secrete waste to form urine. The bladder stores urine, the ureter transports urine from the kidney to the bladder, and the renal pelvis collects urine from the nephrons before it enters the ureter. So urine production occurs in nephrons.

Answer:

A. nephrons.