Cell to cell communication
Cells need to communicate with each other to enable proper physiological response. The movements of the body, for example, are controlled by the brain and the muscles. For this to happen, cells of the brain and the muscle tissues must interact. Communication between cells are usually through chemical signals. Chemical signals, called ligand, are released from a "sending cell" into the extracellular space. The target cells must have the correct receptor for that signal. Once the signal molecule binds to the correct receptor, the target cell changes in conformation to allow the signal molecule to enter the cell. Once the ligand is inside the target cell, chemical reactions take place affecting the activity inside the cell. I-Types of cell signaling There are four types of cell-cell signaling mainly differing in the distance the signal travels through. These are: Autocrine signaling Signaling by direct contact Paracine signaling Endocrine signaling 1. Auto...