XII - CH - 8 - Immunology - P - 2

Mucus coating of the epithelium lining the respiratory, gastrointestinal and urogenital tracts also help in _ _ _ _

• a) trapping microbes entering our body.

• b) Destroying microbes

• c) inhibiting the growth of microbes

• d) interfere the microbial growth

Which one of the following is not a physiological barriers

• a) Acid in the stomach

• b) saliva in the mouth

• c) saliva in the tears

• d) mucus lining

An example for cellular barriers

• a) polymorpho-nuclear leukocytes

• b) interferons

• c) Mucus coating

• d) Acid in the stomach

An example for Cytokine barriers _ _ _ _ _ _ _

• a) Skin on our body

• b) Lysozyme

• c) saliva in the mouth

• d) interferons

The primary and secondary immune responses are carried out with the help of _ _ _ _ _ Cells

• a) B - lymphocytes

• b) T - lymphocytes

• c) Both B-lymphocytes and T - lymphocytes

• d) NK Cells

The B - lymphocytes produce an army of proteins in response to pathogens into our blood are called _ _ _ _ _.

• a) Antigens

• b) antibiotics

• c) antibodies

• d) All the above

Number of peptide chains in an immunoglobulin molecule is / are _ _ _ _ _

• a) 4

• b) 2

• c) 8

• d) 14

Humoral immune response of the body is performed by

• a) T - Cells

• b) B - Cells

• c) NK - Cells

• d) PMN - Cells

Cell - mediated immunity in the human body is preformed by _ _ _ _ _ _ _

• a) T - Cell

• b) B - Cell

• C) NK - Cells

• d) T - Helper cells

A preparation of antigenic proteins of pathogen or inactivated / weakened pathogen (vaccine) are introduced into the body is called _ _ _ _ _ _ _.

• a) immunization

• b) Biological preparation

• c) vaccination

• d) Antibodies