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NEET2019ZoologyHuman Health and DiseasesActual

Humoral immunity is mediated by which of the following ?

Options

  1. AAntibody formation by T-lymphocytes
  2. BAntibody formation by B- lymphocytes
  3. CHaemoglobin is present in RBC.
  4. DBite of snake

Correct answer

B. Antibody formation by B- lymphocytes

Step-by-step solution

Antibody mediated immune system or humoral immunity consists of antibodies (specialised proteins produced in the body in response to antigen) that circulate in the body fluids like blood plasma and lymph. B-lymphocytes (B-cells) produce antibodies that regulate humoral immunity. T-lymphocytes themselves do not secrete antibodies but help B-lymphocytes produce them. Humoral immunity provides defence against most extracellular bacterial pathogens and viruses that infect through respiratory and intestinal tract.

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