Receptors are special stimulus which help in responding to surrounding environment. There are 5 types of receptors , Light ( Photoreceptor ) , Sound , ear ( Phonoreceptor ) , Taste ( Gustutory receptor ) , Skin ( Tactile Receptor ) Smell . ( Olfactory Indicators ).
If receptors will not work properly , then you will not be able to respond to light , sound , taste , touch and smell.