Human Health and Disease


  1. The cell-mediated immunity inside the human body is carried out by:









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    T – lymphocytes mediates cell mediated immunity (CMI). It is one of the two types of acquired immunity responsible for graft or transplant rejection.

    Correct Option: D

    T – lymphocytes mediates cell mediated immunity (CMI). It is one of the two types of acquired immunity responsible for graft or transplant rejection.


  1. Which one of the following statements is correct with respect to immunity?









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    Preformed antibodies need to be injected to treat the bite by a viper snake. It is also a type of immunization which is called as passive immunization. Antibodies, produced by B-cells, are typically made of basic structural units—each with two large heavy chains and two small light chains. B cells differentiate into plasma cells that secrete antibodies. Antibodies are proteins that bind to specific antigens and mark them for destruction by, for example, marking them more recognizable to phagocytic cells. Rejection of a kidney graft is not a function of B lymphocyte.

    Correct Option: A

    Preformed antibodies need to be injected to treat the bite by a viper snake. It is also a type of immunization which is called as passive immunization. Antibodies, produced by B-cells, are typically made of basic structural units—each with two large heavy chains and two small light chains. B cells differentiate into plasma cells that secrete antibodies. Antibodies are proteins that bind to specific antigens and mark them for destruction by, for example, marking them more recognizable to phagocytic cells. Rejection of a kidney graft is not a function of B lymphocyte.



  1. Which one of the following acts as a physiological barrier to the entry of microorganisms in human body?









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    Skin has a metabolic function to prevent non- resident bacteria from developing.

    Correct Option: D

    Skin has a metabolic function to prevent non- resident bacteria from developing.


  1. Select the correct statement with respect to diseases and immunisation?









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    B and T-lymphocytes produce antibodies against pathogen in the body, if due to some reason B and T lymphocytes are damaged the body will not produce antibodies against a pathogen. Each B cell and T cell is specific for a particular antigen.

    Correct Option: A

    B and T-lymphocytes produce antibodies against pathogen in the body, if due to some reason B and T lymphocytes are damaged the body will not produce antibodies against a pathogen. Each B cell and T cell is specific for a particular antigen.



  1. The letter Tin T -lymphocyte refers to









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    The letter T in T-lymphocyte refers to thymus. In human anatomy, the thymus is an organ located in the upper anterior portion of the chest cavity just behind the sternum. The thymus gland is a pink-grey organ that lies underneath the top of the breast bone.

    Correct Option: C

    The letter T in T-lymphocyte refers to thymus. In human anatomy, the thymus is an organ located in the upper anterior portion of the chest cavity just behind the sternum. The thymus gland is a pink-grey organ that lies underneath the top of the breast bone.