Assertion : Ammonia should be eliminated from the body as rapidly as it is formed.
Reason : Ammonia is insoluble in water.
Assertion : Urinary bladder and ureters are lined by transitional epithelium.
Reason : Ureters carry the urine to urinary bladder where it is stored temporarily.
Assertion : Sharks are said to be ammonotelic animals.
Reason : Sharks can retain considerable amounts of ammonia in their blood.
Assertion : Aquatic mammals like whales and seals are said to be ureotelic animals.
Reason : It is because of the fact that their main nitrogenous waste product is urea.
Assertion : Death ensues if waste products are not removed from the body.
Reason : Excretory system removes the nitrogenous waste products from the body.
Assertion : Camel can go without water for long periods.
Reason : Camels stores water in the pouches of their rumen and fat in their hump.
Assertion : Renal threshold of glucose is said to be 180 mg per 100 ml.
Reason : Glucose starts appearing in the urine when its blood level exceed 180 mg per 100 ml of blood.
Assertion : Earthworms excrete both ammonia and urea.
Reason : Excretion in earthworm depends on the environment.
Assertion : If human urine is allowed to stand for some time, it smells strongly of ammonid.
Reason : Main constituent of human urine is Ammonia.
Assertion : Birds can considerably reduce water loss in the urine.
Reason : Birds store urine along with faeces in the cloaca.