What made you want to look up downregulation? Please tell us where you read or heard it (including the quote, if possible).
https://www.merriam-webster.com/medical/downregulation
Cell regulation is the processes in a cell that maintain homeostasis. Problems with cell regulation can cause everything from...
http://www.wisegeekhealth.com/what-is-cell-regulation.htm
Cells even communicate with other cells to prepare them for changes in the cellular environment. Communication that results in cell regulation may occur within a cell, between adjacent or touching cells, or even between distant cells.
http://www.wisegeekhealth.com/what-is-cell-regulation.htm
Cell regulation is a broad term used to describe the many processes that occur within a cell that are aimed at maintaining homeostasis. Homeostasis is a balanced condition in which cell avoids harmful extremes of any form through various active or passive regulatory processes. Regulation processes moderate everything from the growth and replication rates of cells to the salt levels and acidity of the cellular environment.
http://www.wisegeekhealth.com/what-is-cell-regulation.htm
Check your grammar now! : the process of reducing or suppressing a response to a stimulus; specifically : reduction in a cellular response to a molecule (as insulin) due to a decrease in the number of receptors on the cell surface.
https://www.merriam-webster.com/medical/downregulation
Regulation of eukaryotic cell cycle. Regulation of the cell cycle involves processes crucial to the survival of a cell, including the detection and repair of genetic damage as well as the prevention of uncontrolled cell division. The molecular events that control the cell cycle are ordered and directional; that is, each process occurs in a sequential fashion and it is impossible to reverse the cycle.
https://en.wikipedia.org/wiki/Cell_cycle_regulation
The cell cycle or cell-division cycle is the series of events that take place in a cell leading to its division and duplication of its DNA to produce two daughter cells. In bacteria, which lack a cell nucleus, the cell cycle is divided into the B, C, and D periods. The B period extends from the end of cell division to the beginning of DNA replication. DNA replication occurs during the C period. The D period refers to the stage between the end of DNA replication and the splitting of the bacterial
https://en.wikipedia.org/wiki/Cell_cycle_regulation
Medical definition of downregulation: the process of reducing or suppressing a response to a stimulus; specifically : reduction in a cellular… the process of reducing or suppressing a response to a stimulus; specifically : reduction in a cellular response to a molecule (as insulin) due… See the full definition
https://www.merriam-webster.com/medical/downregulation
medical Definition of downregulation : the process of reducing or suppressing a response to a stimulus; specifically: reduction in a cellular response to a molecule (as insulin) due to a decrease in the number of receptors on the cell surface
https://www.merriam-webster.com/medical/downregulation
Cellular signaling is a highly important aspect of the study of cell regulation because most of the regulatory processes within a cell are a response to some form of signal. Changes in a cell's environment may cause signaling proteins or chemicals to bind to signal receptors in order to indicate the need for some form of regulatory response.
http://www.wisegeekhealth.com/what-is-cell-regulation.htm
define cellular regulation
Cell regulation is a broad term used to describe the many processes that occur within a cell that are aimed at maintaining homeostasis.