Year: 2015

This Video, Explains that cells in multicellular organisms need to communicate with each other for proper functioning and coordination of whole body. So, this process of communication in which signaling cell produces signal molecules which in turn is detected by target cell is known as Cell signaling. The signal molecule can be any hormone, chemical, steroid or non steroid like molecule etc. Binding of signal molecule leads to release of small molecular weight molecules known as secondary messengers.
The cell signaling involves different steps:-
a) Synthesis and release of the signal molecule by the signaling cell
b) Transport of signal to the cell
c) Binding of signal to its specific receptor leading to its activation
d) Initiation of signal transduction pathways
Types of cell signaling:-
i. Autocrine Signaling
ii. Paracrine Signaling
iii. Endocrine Signaling