ANIMAL PHYSIOLOGY
EXCRETION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
The release of hormones from glands
|
|
|
The release of saliva into the mouth
|
|
|
The removal of undigested food through the anus
|
|
|
The removal of urea by the kidneys
|
Detailed explanation-1: -Ureotelism. In some mammals and amphibians, urea is excreted as a metabolic waste product. Such organisms are called ureotelic. In these organisms, ammonia that is produced is converted to urea in the liver of animals and is released back into the blood.
Detailed explanation-2: -Excretion is an essential process in all forms of life. For example, in mammals, urine is expelled through the urethra, which is part of the excretory system.
Detailed explanation-3: -Complete answer: Excretion is the elimination from the body of metabolic waste products. Carbon dioxide, urea, ammonia, uric acid, guanine, etc. are the main excretory products.
Detailed explanation-4: -Mammals, many terrestrial amphibians and marine fishes mainly excrete urea and are called ureotelic animals. Ammonia produced by metabolism is converted into urea in the liver of these animals and released into the blood, which is filtered and excreted out by the kidneys.
Detailed explanation-5: -Mammals, including humans, are the primary producers of urea. Because they secrete urea as the primary nitrogenous waste product, they are called ureotelic animals. Urea serves an important role in the metabolism of nitrogen-containing compounds by animals.