B cells, also known as B lymphocytes, are a key part of the adaptive immune response. They are responsible for humoral immunity in mammals. B cells produce antibodies, which are proteins that bind to pathogens and foreign substances to neutralize them. For example, an antibody can bind to a virus to prevent it from entering a normal cell and causing infection. B cells are produced throughout a person's life. They start in the fetal liver and then in the bone marrow after birth. B cells differentiate in the bone marrow through five steps: early pro-B cells, late pro-B cell stage, pre-B... Show more B cells, also known as B lymphocytes, are a key part of the adaptive immune response. They are responsible for humoral immunity in mammals. B cells produce antibodies, which are proteins that bind to pathogens and foreign substances to neutralize them. For example, an antibody can bind to a virus to prevent it from entering a normal cell and causing infection. B cells are produced throughout a person's life. They start in the fetal liver and then in the bone marrow after birth. B cells differentiate in the bone marrow through five steps: early pro-B cells, late pro-B cell stage, pre-B cell stage, immature B cells, and mature B cells. Each B cell produces a single type of antibody, each with a unique antigen-binding site. When a B cell is activated by an antigen, it proliferates and differentiates into an antibody-secreting effector cell. B cells can also transform into plasmocytes. A low B cell count could be a sign of acute lymphoblastic leukemia or a disease that weakens the immune system, such as HIV. B-cell lymphomas are the most common type of non-Hodgkin lymphoma. About 85% of all lymphomas in the United States are considered B-cell. Related: Life Sciences Practice Test: T-Cells Show less
B cells, also known as B lymphocytes, are a key part of the adaptive immune response. They are responsible for humoral immunity in mammals.
B cells produce antibodies, which are proteins that bind to pathogens and foreign substances to neutralize them. For example, an antibody can bind to a virus to prevent it from entering a normal cell and causing infection. B cells are produced throughout a person's life. They start in the fetal liver and then in the bone marrow after birth. B cells differentiate in the bone marrow through five steps: early pro-B cells, late pro-B cell stage, pre-B cell stage, immature B cells, and mature B cells. Each B cell produces a single type of antibody, each with a unique antigen-binding site. When a B cell is activated by an antigen, it proliferates and differentiates into an antibody-secreting effector cell. B cells can also transform into plasmocytes. A low B cell count could be a sign of acute lymphoblastic leukemia or a disease that weakens the immune system, such as HIV.
B-cell lymphomas are the most common type of non-Hodgkin lymphoma. About 85% of all lymphomas in the United States are considered B-cell.
Related: Life Sciences Practice Test: T-Cells
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