Transcript Objectives 13

Objective 13
• Plasma cells produce
antibodies against antigens.
• Memory cells mount a rapid
attack against the same
antigen.
• Antibody structure
Objective 14
• Active immunity is acquired
during an infection or from a
vaccination.
Obj.14 continued
• Passive immunity is given
when a donor’s antibodies
are injected into the bloodstream or from mother.
Obj. 15 5 Classes of Antibodies
• IgA (immunoglobulin A)
• IgG (these all differ by
• IgM structure and function)
• IgD
• IgE
Obj. 16 Function of Antibodies
• Complement fixation
• Antigen neutralization
• Precipitation
• Agglutination
Objective 17: Clonal Selection
of T cells
• T cell growth is stimulated by
the protein displayed on the
surface of the macrophage.
• Some become active killers
others become memory T cells.
Obj. 18: Roll of T Cells
• Cytotoxic T cells attack and
lyse infected cells.
• Helper T cells release
interleukin.
• Suppressor T stop immune
response
Objective 19: Immune Diseases
• Congenital thymic aplasia
• Severe combined
immunodeficiency
• Acquired immunodeficiency
Objective 19 continued
• Hypersensitivities or allergies
an abnormally intense response
to an allergen.
Objective 20: Tolerance
• Sometimes tolerance develops.
• The body does not react to an
allergen.