Cell signalling: Difference between revisions
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Cell Signalling is the transfer of information, that controls the [[Cell|cell]] behaviour, whether from cell to cell, or from environment to cell.<br>There are many different types of cell signalling that vary immensley. About 10-15% of the [[Genome|genome]] codes for the creation of these cell signalling molecules. Most signals involved are chemicals but some can be physical signals such as light.<br> | Cell Signalling is the transfer of information, that controls the [[Cell|cell]] behaviour, whether from cell to cell, or from environment to cell.<br>There are many different types of cell signalling that vary immensley. About 10-15% of the [[Genome|genome]] codes for the creation of these cell signalling molecules. Most signals involved are chemicals but some can be physical signals such as light.<br> | ||
Different signalling mecahnisms are used depending on how far the signal needs to travel. For short distances, there is a pathway between adjacent cells and takes place via a [[Gap junction|gap junction]]. The pathway size then increase from gap junction, to contact dependant, where the signal is displayed on the surface and a receptor on another cell surface, for example, an immune response cell. | Different signalling mecahnisms are used depending on how far the signal needs to travel. For short distances, there is a pathway between adjacent cells and takes place via a [[Gap junction|gap junction]]. The pathway size then increase from gap junction, to contact dependant, where the signal is displayed on the surface and a receptor on another cell surface, for example, an immune response cell. [[Paracrine_signals|Paracrine pathways]] secrete a signal into the interstitial fluid within the same tissue. The next longer pathway is [[Autocrine signalling|Autocrine signalling]] and [[Synaptic signalling|Synaptic signalling]]. The longest signalling pathway, which usually has the longest response time to the stimulus is [[Endocrine signalling|Endocrine signalling]], where the signal is secreted into the [[Blood|blood]] stream which flows around the body.<br> | ||
There are 5 stages; Signal, Reception, Transduction, Amplification and Response | There are 5 stages; Signal, Reception, Transduction, Amplification and Response | ||
Revision as of 18:21, 10 November 2013
Cell Signalling is the transfer of information, that controls the cell behaviour, whether from cell to cell, or from environment to cell.
There are many different types of cell signalling that vary immensley. About 10-15% of the genome codes for the creation of these cell signalling molecules. Most signals involved are chemicals but some can be physical signals such as light.
Different signalling mecahnisms are used depending on how far the signal needs to travel. For short distances, there is a pathway between adjacent cells and takes place via a gap junction. The pathway size then increase from gap junction, to contact dependant, where the signal is displayed on the surface and a receptor on another cell surface, for example, an immune response cell. Paracrine pathways secrete a signal into the interstitial fluid within the same tissue. The next longer pathway is Autocrine signalling and Synaptic signalling. The longest signalling pathway, which usually has the longest response time to the stimulus is Endocrine signalling, where the signal is secreted into the blood stream which flows around the body.
There are 5 stages; Signal, Reception, Transduction, Amplification and Response