Up-regulation

Definition

Up-regulation is the process by which a cell increases the number of receptors for a particular hormone, enhancing its sensitivity to that hormone. This mechanism helps cells respond more effectively to hormonal signals during periods of increased demand.

5 Must Know Facts For Your Next Test

1. Up-regulation often occurs in response to low levels of a hormone in the bloodstream.
2. This process can increase cellular activity and amplify the effects of the hormone.
3. Up-regulation is crucial during stress responses where quick adaptation is necessary.
4. The number of receptors on the cell surface can be dynamic, changing based on physiological needs.
5. Hormonal therapies sometimes aim to manipulate up-regulation to treat various diseases.

Related terms

Down-regulation: A process where cells decrease the number of receptors for a particular hormone, reducing sensitivity.

Hormone Receptors: Proteins on or inside cells that bind to specific hormones and mediate their effects.

Feedback Mechanism: A biological system where the end product influences the activity rate or quality of an earlier step in the pathway.