Receptors are specialized structures that can be found in different parts of the body, including the cell membrane and the ends of nerve cells. They are capable of recognizing and receiving messages from the environment, and they play a crucial role in the nervous system by detecting information around our external environment through stimuli and creating impulses into the nervous system. Receptors are mostly made up of proteins and can detect signals that are weak and intense. There are different types of receptors in the human body, including sensory receptors that occur in specialized organs such as the eyes, ears, nose, and mouth, as well as internal organs. Each receptor type conveys a distinct sensory modality to integrate into a single perceptual frame eventually, and this information is achieved by the conversion of energy into an electrical signal by specialized mechanisms. All sensory signals begin as receptor potentials, and creating a receptor potential requires surpassing a threshold level in the membrane potential.