Helper T cells
A) Are activated by antigen presented with MHC II proteins
B) Secrete interferon-gamma when activated
C) Secrete perforin when activated
D) Both are activated by antigen presented with MHC II proteins and secrete interferon-gamma when activated are correct
E) All of the choices are correct
Correct Answer:
Verified
Q21: Binding of IgG or IgM to an
Q22: AIDS is
A)Caused by a retrovirus
B)Caused by a
Q23: A subject with type O blood has
A)Erythrocytes
Q24: Antibodies are
A)Secreted by helper T cells
B)Cytokines
C)Immunoglobulins
D)Composed of
Q25: Autoimmune diseases
A)Include multiple sclerosis and AIDS
B)Can be
Q27: Graft rejection
A)Occurs primarily because donor macrophages recognize
Q28: Antibodies
A)Are secreted by plasma cells
B)Protect against viruses
Q29: Compared to undifferentiated B cells,
A)Plasma cells are
Q30: Cytotoxic T cells
A)Secrete perforin, which kills bacteria
Q31: Allergic reactions are the result of
A)Inappropriate responses
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