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Apr 9, 2024 · Tissues can be classified into 3 types depending on the ability to self-repair, which depends on their stem cell activity: Cellular Adaptations. When cells experience environmental stressors or other stimuli, they undergo adaptations to allow them to function better and survive in this new environment.
Jan 17, 2023 · Key Points. B cells and T cells, the major types of lymphocytes, are very important in the adaptive immune system. B cells, type 2 helper T cells, antibodies, mast cells, and eosinophils are involved in the humoral immune response. Type 1 helper T cells and cytoxic T-cells are involved in cell-mediated immune response.
Jul 14, 2022 · Macrophages are a type of white blood cell that play an integral part in the immune system with the role of phagocytosing foreign antigens, such as bacteria. They are able to present these antigens to other immune cells, such as T-cells, for further destruction.
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May 13, 2022 · Not only do T cells directly destroy pathogens, but they regulate nearly all other types of the adaptive immune response as well, as evidenced by the functions of the T cell types, their surface markers, the cells they work on, and the types of pathogens they work against (see Table).
Oct 30, 2023 · Macrophage. Macrophagocytus. 1/5. Synonyms: none. The macrophages are highly specialized, multitasking immune cells that play a key role in the protection of the organism against pathogen invasion. The macrophages originate from the monocytes, a type of white blood cells that comes from the bone marrow.
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Differentiation. When a cell differentiates (becomes more specialized), it may undertake major changes in its size, shape, metabolic activity, and overall function. Since all cells in the body, beginning with the fertilized egg, contain the same DNA, how do the different cell types come to be so different? The answer is analogous to a movie script.
If cells cannot adapt to the pathologic stimulus, they can die. This chapter will discuss cellular adaptation, cell injury, cellular accumulations, and cellular aging. Overview: The four basic types of cellular adaptation to be discussed in this section are hyperplasia, hypertrophy, atrophy, and metaplasia.
