Naive t cells encounter antigen and activate, eventually leaving this compartment as an effector t cell at dendritic cells in lymph tissue (lymph nodes and spleen).
<h3>What is T-cell activation?</h3>
They are a type of white blood cell. T-lymphocytes are the part of the immune system and develop from stem cells in the bone marrow however they develop fully in thymus and leave after maturation. They help in protecting the body from infection and may also help fight cancer. They are also known as T cell and thymocyte.
T-cells get mobilized when they encounter a cell (dendritic cells or B-cells) displaying antigenic peptides bound to its MHC molecule. This MHC-antigen complex activate T-cells receptors and the T-cells start secreting cytokines.
some T-cells become helper T-cells and attract fresh macrophages, neutrophils and other lymphocytes and other cytokines to direct them at the site of action while some T-cell become cytotoxic and track down the virus infected cells.
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Its Fins, gills, and tail are all crucial for a sharks survival
Answer:
The answer is Brain Stem.
Explanation:
The brain part that we are least consciously aware of is the brain stem and the reason is because of how it operates and it's functions.
The brain stem is the part of the brain that is located at the end and controls the message flow between our body and our brain. It also regulates our physiological processes such as heart rate, blood pressure, breathing etc. without our notice.
I hope this answer helps.
Answer:
The correct answer is - homologous chromosome exchange genetic information during prophase I.
Explanation:
Genetic variation or diversity in the offspring of an organism comes from the process of crossing over which takes place in gametes formation during meiosis.
In prophase I of meiosis I, the recombination or crossing over takes place in which the homologous chromosomes pair joins with a structure called synapsis, and segments or the arms of the non-sister chromatids are exchanged during the production of the gamets.
