NEETClass 11thClass 12thClass 12th PlusJEEClass 11thClass 12thClass 12th PlusClass 6-10Class 6thClass 7thClass 8thClass 9thClass 10thOnline CoursesDistance LearningInternational OlympiadNEETClass 11thClass 12thClass 12th PlusJEE (Main+Advanced)Class 11thClass 12thClass 12th PlusJEE MainClass 11thClass 12thClass 12th PlusClass 6-10Class 6thClass 7thClass 8thClass 9thClass 10thNEET2025202420232022JEE20262025202420232022Class 6-10JEE MainPrevious Year PapersSample PapersMock TestResultAnalysisSyllabusExam DatePercentile PredictorAnswer KeyCounsellingEligibilityExam PatternJEE MathsJEE ChemistryJEE PhysicsJEE AdvancedPrevious Year PapersSample PapersMock TestResultAnalysisSyllabusExam DateAnswer KeyEligibilityExam PatternRank PredictorNEETPrevious Year PapersSample PapersMock TestResultAnalysisSyllabusExam DateCollege PredictorAnswer KeyRank PredictorCounsellingEligibilityExam PatternBiologyNCERT SolutionsClass 6Class 7Class 8Class 9Class 10Class 11Class 12TextbooksCBSEClass 12Class 11Class 10Class 9Class 8Class 7Class 6SubjectsSyllabusNotesSample PapersQuestion PapersICSEClass 10Class 9Class 8Class 7Class 6State BoardBiharKarnatakaMadhya PradeshMaharashtraTamilnaduWest BengalUttar PradeshOlympiadMathsScienceEnglishSocial ScienceNSOIMONMTCASATInstant Online ScholarshipAIOT(NEET)TALLENTEXALLEN for SchoolsAbout ALLENBlogsNewsCareersRequest a call backBook a demo
B Lymphocytes
B lymphocytes, also known as B cells, play a crucial role in the adaptive immune system. Developed in the bone marrow, they produce antibodies that specifically target and neutralise pathogens, including bacteria and viruses. B cells also support immune memory, allowing the body to respond more quickly to previously encountered infections.
1.0What are Lymphocytes?
- Lymphocytes are a subtype of white blood cells essential to the immune system.
- They play a critical role in defending the body against infections, foreign invaders, and abnormal cells.
- The two primary types of lymphocytes are B lymphocytes (B cells) and T lymphocytes (T cells), each with unique functions in the immune response.
2.0B-Cell Function
- The primary function of B cells is to identify and neutralise pathogens, including bacteria and viruses.
- Upon encountering an antigen, B cells differentiate into plasma cells that secrete antibodies.
- These antibodies bind to antigens, marking them for destruction by other immune cells.
- Additionally, B cells function as antigen-presenting cells (APCs), facilitating the activation of different immune responses.
3.0What is the Role of the B Lymphocytes?
- B lymphocytes play a crucial role in humoral immunity, which is the part of immunity mediated by macromolecules found in extracellular fluids. Their key roles include:
- Antibody Production: B cells create specific antibodies that recognise antigens and neutralise pathogens.
- Memory Formation: Some B cells turn into memory cells, allowing for quicker and stronger responses when exposed to the same antigen again.
- Antigen Presentation: B cells present processed antigen fragments to helper T cells, thereby coordinating the immune response.
- Immune Regulation: They help control the strength and length of immune responses.
4.0Activation of B Lymphocytes
- B cell activation occurs when their B cell receptors (BCRs) recognise and bind specific antigens.
- This act initiates a sequence of intracellular signals that induce B cell proliferation and differentiation. Activation usually involves help from helper T cells, which provide the required signals through cytokines and cell-to-cell interactions.
- It results in the production of plasma cells that produce antibodies and memory B cells that provide long-term immunity.
5.0Differences Between B Lymphocytes vs T Lymphocytes
- The immune system has a line of defense that consists of specialised white blood cells known as lymphocytes. Out of these, B lymphocytes (B cells) and T lymphocytes (T cells) have unique and cooperative functions.
- Knowing the differences between B lymphocytes vs T lymphocytes is essential for understanding the role of the immune system.