Nextdoor is the private social network for your neighborhood. On Nextdoor, neighbors create private groups for their neighborhoods where they can ask questions, get to know one another, and exchange local advice and recommendations.
Up-regulation is a process that occurs within a cell triggered by a signal (originating internal or external to the cell), which results in increased expression of one or more genes and as a result the protein(s) encoded by those genes.
Signal transduction occurs when an extracellular signaling molecule activates a specific receptor located on the cell surface or inside the cell.In turn, this receptor triggers a biochemical chain of events inside the cell, creating a response.Depending on the cell, the response alters the cell's metabolism, shape, gene expression, or ability to divide. The signal can be amplified at any step. Thus, one signaling molecule can cause many responses.ignal transduction involves the binding of extracellular signaling molecules also called ligands to receptors that trigger events inside the cell. The combination of signaling molecule with a receptor causes a change in the conformation of the receptor, known as receptor activation.