Which class of antibody has no known function other than as an antigen receptor?a. IgMb. IgAc. IgEd. IgD

Which type of immune response works in concert withcytotoxic T cells against virally infected cells?a. natural killer cellsb. complementc. antibodiesd. memory

Construct a typical antibody (immunoglobulin) molecule. Label the variable and constant regions, and the light and heavy chains.  Indicate which region determines the antibody’s isotype (class). Indicate which region determines its antigenic specificity.

Cells called histiocytes are specialized phagocytes which remain within certain tissues. O 1) True O 2) False

If you come down with the flu, your body will launch an immune attack against the flu virus. During the recognition phase of the adaptive immune response: a   an antigen of the virus will be presented by an antigen-presenting cell and be recognized by T-helper cells b   B cells will recognize the viral particles and produce antibodies against them c   cytotoxic T cells will recognize the virus-infected cells and kill them d   antibodies will recognize the viral antigens, bind to them, and attract phagocytes e   a T-helper cell will recognize the viral antigen and stimulate B cells and cytotoxic T cells to divide

How are innate lymphoid cells, including natural killer cells, distinguished from lymphocytes? a- stimulation by pathogen associated molecular patterns b- single lobed nucleus c- production of cytokines d-expression of rearranged antigen receptors

Interferon is a mechanism used to protect the cell that becomes infected with a virus.A. TrueB. False