Answer:
Endocrine :
Endocrine cells may be defined as the cells that helps in the cell signalling in which the cells are located far apart. The product can shows slow effect but long lasting effect.
Paracrine:
Paracrine cells may be defined as the cells that are involved in the paracrine signalling. They acts on the cells that are located close to each other and generates quick response in body.
Autocrine :
Autocrine cells that are involved in the autocrine signalling affect their own cells. The target and signalling cells are same in autocrine. The pain sensations of the body are also regulated by autocrine signalling.