Question

TRUE OR FALSE

1. In the primary immune response, there is no antibody production in the the lag phase, only B cell proliferate and differentiate.

2.Rh factor is an antibody found on the red blood cells of Rh positive people.

3.In the process of hemostasis, formation of platelet plugs and fibrin clots occur simultaneously.

4..Neutrophils are a critical component of the response to a parasitic infection.

5.Helper T cells are critical for proper activation of both CD8 T cells and plasma cells during adaptive immune responses.

6. The thymus is the site of maturation of B cells.

Answer 1

1.True-

When a Antigen encounter body for the first time---The immune response is called Primary immune response.

Following first exposure to a foreign antigen---There is a lag phase in which no antibody is produced, but during this phase activated B cells are differentiating into plasma cells.(Plasma cells are type of B cells that secreates Antibodies)

2.False.

Rh factor is the ANtigen which is present in the surface of RBC.

Those Blood type which contain Rh factor in the surface of rbc are Rh +ve and those blood type which lacks Rh factor in the surface of rbc are Rh -ve.

3.True.

Primary hemostasis - platelet plug formation, which leads to fromation of primary clot.

Secondary hemostasis -coagulation cascade, which helps formation of fibrin mesh which strengthen platelet plug.

Secondary hemostasis & Primary hemostasis occurs simultaneously but Secondary hemostasis finishes afterprimary hemostasis.

4.False.

Eosinophilic leukocytesare critical component in host protection against parasitic worms .

Neutrophils provide an important link between innate & adaptive immunity during parasite infections.

5.True

Helper T cells are important cells in adaptive immunity.They are required for almost every adaptive immune responses. They-

1.Help activation of B cells to secrete antibodies & macrophages which destroy ingested microbes

2.They help activation of cytotoxic T cells to kill infected target cells