Question

Which of the following cells do not take part in innate immunity?

• A. Neutrophils
• B. Natural killer cells
• C. B-lymphocytes
• D. Macrophages

Answer 1

The correct option is C B-lymphocytes

Innate immunity is a broad non-specific immune response present from the time of birth, which includes physical barriers like skin, mucus membrane etc. and chemical barriers like acidic pH of stomach, intestinal secretions, tears, saliva and various antimicrobial peptides. There are various processes involved in the innate immunity, one of which is phagocytosis, where phagocytic cells like neutrophils, macrophages etc. phagocytise the foreign pathogens and also helps in removing cell debris and apoptotic cells.

Acquired immunity is the immunity that an individual acquires during their lifetime, which is highly specific and is generated after recognising a specific antigen, unlike innate immunity. B-lymphocytes are involved in acquired immunity and antibody production. Upon antigen recognition B cells are differentiated into plasma cells which in turn produce antibodies.