Immunology Quiz 1 - ImmunologyQuiz1 "immunity

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Immunology Quiz 1 Which is the best definition of "immunity"? When the immune system is activated  When an individual has never been exposed to a pathogen When physical barriers are not enough to prevent infection  The state of being resistant to reinfection with a pathogen The state of having been exposed to a pathogen repeatedly Conditions in which the immune system attacks self-antigens are known as:  None of the above neuroplasias.  autoimmunity.  hypersensitivities. immune deficiency. What occurs when someone receives a tissue transplant from an unrelated individual?  The donor's lymphocytes suppress the host's lymphocytes, allowing for graft survival. The host's lymphocytes that react to the tissue graft are deleted in the thymus.  The host's lymphocytes enter the tissues and become  activated.  The host's lymphocytes enter the tissues and become suppressed.  The donor's lymphocytes destroy the host's immune system. Predict the outcome of being immunosuppressed as it relates to the development of cancer.  Immunosuppressed individuals are at lower risk of cancer because they are more likely to contract  infectious diseases.  None of the above.  Immunosuppressed individuals are at higher risk of cancer because the immune system  recognizes and destroys cancerous cells Immunosuppressed individuals are at lower risk of cancer because cytokines produced by the  immune system induce cancer.  Immunosuppressed individuals are at higher risk of cancer because they bear a higher load of  microbes that damage host tissues.  HIV disease is a/an:  hypersensitivity disease.
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