Signal (biology)
A signal in biology is any kind of coded message sent from one organism to another, or from one place in an organism to another place.
- Vocal calls
- Some social behaviours
- Chemical signals
- inside organisms
- nerve transmission
- hormones
- inside cells
- between organisms
- inside organisms
In biology, especially in electrophysiology, a signal or biopotential is an electric quantity (voltage or current or field strength), that is caused by chemical reactions of charged ions. Biological signals can also be seen as an example of signal (electrical engineering).
Another use of the term lies in the transfer of information between and within cells, as in signal transduction.
Signal (biology) Media
Diagram of G-protein coupled reception
Different types of extracellular signaling
Differences between autocrine and paracrine signaling
This image displays the different types of cell signaling
This image depicts paracrine signaling, where a secretory cell releases signaling molecules that diffuse and trigger cellular responses in nearby target cells
This image displays endocrine signaling, the process by which endocrine glands produce hormones that are released into the bloodstream, allowing them to travel to distant target cells and bind to specific receptors, triggering a cellular response.
Transmembrane receptor working principle
The AMPA receptor bound to a glutamate antagonist showing the amino terminal, ligand binding, and transmembrane domain, PDB 3KG2
A G Protein-coupled receptor within the plasma membrane
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License image for the CC0 Public Domain Dedication.
