AP BIOLOGY

Detailed explanation-1: -Urine is a liquid waste formed by the kidneys as they filter the blood. Urine helps remove excess water, salts, and nitrogen from your body.

Detailed explanation-2: -Nitrogenous Waste in Terrestrial Animals: The Urea Cycle The urea cycle is the primary mechanism by which mammals convert ammonia to urea. Urea is made in the liver and excreted in urine.

Detailed explanation-3: -Excess nitrogen is excreted from the body. Nitrogenous wastes tend to form toxic ammonia, which raises the pH of body fluids. The formation of ammonia itself requires energy in the form of ATP and large quantities of water to dilute it out of a biological system.

Detailed explanation-4: -The main organ that excretes nitrogenous waste in this system is the kidney. The kidney filters blood and removes excess water, salts, and nitrogenous waste into the filtrate. The filtrate is concentrated into urine and then is released to the bladder where it is stored.

Detailed explanation-5: -Animals excrete a variety of nitrogen waste products, but ammonia, urea and uric acid predominate.