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Proliferation in Biological Definition

Apoptosis

... renewed by their respective progenitor cells; but proliferation has to be compensated by cell death. This ... human adult. In a year, this amounts to the proliferation and subsequent destruction of a mass of cells ... in order to maintain an equilibrium between cell proliferation and death in a particular tissue (see ...

Cancer

... regulation of cells. Cell multiplication ( proliferation ) is a normal physiologic process that occurs in ... digestive tract ). Normally the balance between proliferation and cell death is tightly regulated to ensure the ... processes. The uncontrolled and often rapid proliferation of cells can lead to either a benign tumor or ...

Oncogene

... secreted by a few special cells to induce cell proliferation in other cells. If a cell that usually does not ... it will thereby induce its own uncontrolled proliferation ( autocrine loop ), as well as the proliferation of neighboring cells. Protein kinases and ...

Cartilage

... The cartilage covering bones in joints (articular cartilage) is degraded, resulting in limitation of movement and pain. Achondroplasia : Reduced proliferation of chondrocytes in the epiphyseal plate of long bones results in a form of dwarfism . Costochondritis : Inflammation of cartilage in the ribs ...

Immune system

... (T H cells) activate infected macrophages (cells that ingest dangerous material), and also produce cytokines ( interleukins ) that induce the proliferation of B and T cells. In addition, there are Regulatory T cells (T reg cells) which are important in regulating cell-mediated immunity. ...

Signal transduction

... is used in a multitude of processes, among them muscle contraction, release of neurotransmitter from nerve endings, vision in retina cells, proliferation , secretion , cytoskeleton management, cell motion , gene expression and metabolism . The three main pathways that lead to Ca 2+ activation ...
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