Receptors are specialised called tissues, organ game and nerve ending which are able to pick up specific stimuli e.g gustatory receptors help in detecting taste and olfactory receptors help in sensing smell receptors provide sensory input about external and internal environment. Without them an animal will not be able to observe handle and taste food.
It will, not be aware of an approaching enemy. The animal may not be able to correct its positions and will fall down repeatedly. Therefore animal will not be able to perform the normal activities connected with the defective receptors.
