Name one nitrogenous waste present in urine. What is the basic filtration unit of kidney called? How is the amount of urine produced regulated?

(N/A) One nitrogenous waste present in urine is $Urea$.
The basic filtration unit of the kidney is called a $Nephron$.
The amount of urine produced is regulated by the quantity of excess water present in the body and the amount of dissolved nitrogenous wastes that need to be excreted. Additionally,hormones like $ADH$ (Antidiuretic Hormone) play a crucial role in reabsorbing water from the kidney tubules based on the body's hydration status.