Answer:
IgE
Explanation:
Immunoglobulins can be described as antibodies that are found in blood and other bodily fluids of humans and other vertebrate animals. And their major function is that they help identify and destroy foreign substances such as microbes such as bacteria and protozoan parasites.
They are known to be produced by produced by plasma cells (white blood cells).
Immunoglobulins are classified into five categories: IgA, IgD, IgE, IgG and IgM. And are distinguished by the type of heavy chain they contain. IgG molecules possess heavy chains known as γ-chains; IgMs have μ-chains; IgAs have α-chains; IgEs have ε-chains; and IgDs have δ-chains.
In this case, IgE is the immunoglobulin that attach to and sensitize mast cells and basophils.
The steps of tissue repair in order from start to finish are 1, 3, 2, 4.
The method of tissue repair follows some steps below especially when the damaged tissue are in close apposition.
These steps in order from start to finish include:
- Bleeding into the cut: This is the homeostasis stage. As the wound bleeds, the aim of this stage is to stop the bleeding by activation of emergency repair system, the blood clotting system.
- Scab formation; macrophages become active: This is the inflammatory stage. Phagocytes such as the macrophages begin to remove the dry blood clot called scabs and cell debris.
- Formation of granulation tissue and fibroblastic phase of repair: This stage is called the proliferation stage. Granulation tissue which contains new capillary buds, phagocytes and fibroblasts, develops. Fibroblasts continues to secrete collagen fibres for the tissue restoration.
- Epithelial regeneration; fibrosis; remodeling phase: This is the maturation stage. Here, the granulation tissue is replaced by fibrous scar tissue and rearrangement of the collagen fibres occurs, increasing the strength of the wound.
Therefore, the steps of tissue repair in order from start to finish are 1, 3, 2, 4.
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