Communication of cells

The biologist Dr. Doping speaks about nerve cell functions, methods of communication, and the immune system. As nerve cells transmit information? In what ways can communicate with cells? What chemicals involved in this communication? And how the immune system works?

The cells in a multicellular organism "understand" their environment, they provide information about themselves, and their functioning is correlated. For example, the brain cells to understand what makes a skin cell or a cell of language: is constantly coordinating efforts, so that the body was complete. These mechanisms for communication of cells by the way they give and receive signals, greatly evolved with the evolution of multicellular organisms.

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Nerve cells are able to receive information about what is happening in the external environment, transmit an electrical impulse in its membrane to the brain, process it, and return back to give a signal muscle. For example, a signal that you need to draw back his hand from the fire. They secrete a substance called a neurotransmitter. It interacts with the next nerve cell, it appears the nerve impulse, distributed, it comes to the next cell, and so on.

In the course of evolution, cells have learned to recognize not only the factors that contributed the cell, but also what is happening in neighboring cells. This makes the immune system. It constantly checks what is going on inside the cell. Normal cell is not dangerous for the organism, but in fact it can be a cell that is infected with a virus or a tumor cell, which is dangerous. Therefore, the cell must always know what's happening with their "neighbors."