Question

humoral immunity is mostly the function of

a) MHC I

b) complement cells

c) cytotoxic t cells

d) mast cells

e) B cells

Answer 1

Humoral immunity is a particular immunue system where the antibodies from plsma cell kills the free moving antigen or pathogen in the body fluid.

MHC I is not a cell it is a receptor which shows tha antibody producing cell about the antigen. Hence it does not caused the humoral immunity but helps in it.

Complement cells helps the antibody to function properly . Clearly it increases the speed of antibody to clear the antigen at a fast rate. Hence it is also wrong.

Cytotoxic T cell are rleased by the mature T cells with the aid of helper T cell. But in humoral immunity the antibody comes from plasma cell. Hence it is also wrong.

Mast cells are abandantly found in the skins . It doesnot comes from plasma cells. Hence humoral immunity is caused by plasma cell , it is wrong.

B cells is provided antigen by the Th cell . After first interact with antigen a mature B cell differentiate into two specialised cell viz memory cell and plasma cell. The plasma cell releases antibody which help to clear the the pathogen. Hence it caused the humoral immunity.

So the right answer is B CELLS.