12 public questions tagged with this topic.
T-cytotoxic cells (CD8+ T-cells) play a central role in cell-mediated immunity by destroying virus-infected and cancerous cells.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Cancer - Causes Types Treatment Metastasis
Thymosin, secreted by the thymus, promotes the development and differentiation of T-lymphocytes.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Cancer - Causes Types Treatment Metastasis
Active acquired immunity develops when the immune system produces antibodies in response to an infection.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Immunity - Acquired Immunity - Active Passive Vaccination
Vaccines stimulate the immune system to develop active acquired immunity by producing memory cells.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Immunity - Acquired Immunity - Active Passive Vaccination
Vaccines stimulate the immune system to produce memory cells, providing long-term immunity.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Immunity - Acquired Immunity - Active Passive Vaccination
Killed vaccines contain inactivated pathogens that stimulate an immune response without causing disease.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Immunity - Acquired Immunity - Active Passive Vaccination
Vaccines provide **active** immunity by stimulating the immune system, not passive immunity.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Immunity - Acquired Immunity - Active Passive Vaccination
Active acquired immunity develops when the body produces antibodies and memory cells after recovering from an infection.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Immunity - Acquired Immunity - Active Passive Vaccination
Leukocytes (WBCs) are responsible for immune responses and fighting infections.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Blood - Plasma and Formed Elements
Oxidative burst, is consistent with established principles of cell signaling, receptor pharmacology and cellular regulation. Experimental measurements of binding parameters, genetic loss-of-function studies and pharmacological interventions all converge on the same interpretation. Related options address neighboring concepts but do not satisfy the precise criterion stated in the question.
Ref: NCERT Biology Class 11–12 Alberts et al Molecular Biology of the Cell Lodish et al, Molecular Cell Biology Cooper & Hausman, The Cell Abbas et al., Cellular and Molecular Immunology (for immunology sections)
Natural killer cells survey the surface of potential target cells for the presence of MHC class I molecules. Cells that lack or down-regulate MHC I, a common strategy of viruses and tumors, are recognized as missing-self and are killed by release of perforin and granzymes. NK cells therefore provide an important innate barrier against transformed and virally infected cells.
Ref: NCERT Biology Class 11–12 Alberts et al Molecular Biology of the Cell Lodish et al, Molecular Cell Biology Cooper & Hausman, The Cell Abbas et al., Cellular and Molecular Immunology (for immunology sections)
Both innate and adaptive immunity, is consistent with established principles of cell signaling, receptor pharmacology and cellular regulation. Experimental measurements of binding parameters, genetic loss-of-function studies and pharmacological interventions all converge on the same interpretation. Related options address neighboring concepts but do not satisfy the precise criterion stated in the question.
Ref: NCERT Biology Class 11–12 Alberts et al Molecular Biology of the Cell Lodish et al, Molecular Cell Biology Cooper & Hausman, The Cell Abbas et al., Cellular and Molecular Immunology (for immunology sections)
