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Which cells are required to process and present antigens from foreign material as the initial step in the immune response?
A patient experienced an episode of influenza 6 months ago. A recent exposure to a mutated form of the same virus would result in
a primary immune response
When an allergen binds with IgE antibodies on mast cells, resulting in release of chemical mediators, this reaction is called:
type I hypersensitivity
Why is anaphylaxis considered a critical situation?
bronchoconstriction and systemic vasodilation develop rapidly
Distinguishing clinical features of systemic lupus erythematosus include
inflammation in multiple organs
Which statement does NOT apply to MHC proteins or molecules?
all members of a family have identical MHCs
Which of the following characteristics apply to the agent HIV?
It tends to mutate frequently to form new strains
It is inactivated by heat and many disinfectants
In cases of HIV infection the "window period" refers to the time between
entry of the virus into the body and the appearance of antibodies in the blood
Which of the following is an effect of cytokines?
They activate and stimulate proliferation of B and T lymphocytes
What does seroconversion mean in relation to HIV and AIDS?
Antibodies for HIV have been indentified in the blood
Which of the following statements is true regarding a patient who is HIV positive?
Antibodies in the blood indicate presence of virus and possible transmission to others
Which of the following statements apply to the complement system?
It consists of proteins in the blood that must be activated
Which of the following statements regarding immunoglobins is TRUE?
They consist of a unique sequence of amino acids
Which statement is TRUE regarding infants born to HIV infected mothers?
Infants test positive for HIV due to presence of maternal antibodies
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