Question

Difference between uricotelic and ureotelic excretion?(2 marks)​

Answer 1

• Animals which secrete Uric acid are called uricotelic Animals.
• Animals which secrete Urea are called ureotelic animals

Answer 2

uricotelism

• It is the elimination of nitrogenous waste in form of uric acid.
• removal of 1 gm of uric acid requires 5 to 10 ml of water.
• Uric acid is least toxic.
• in liver of birds, ammonia is converted to uric acid by ionosinic pathway.
• examples- birds, reptiles, insects, etc.

Ureotelism

• It is the elimination of nitrogenous waste in form of urea.
• removal of 1 gm of urea requires 50 ml of water.
• Uric acid is less toxic than ammonia and can be retained in the body for some time.
• in liver of mammals, ammonia is converted to urea by ornithine cycle
• examples- mammals, terrestrial animals, sharks,etc.