Today’s Agenda w Objective 13-16 notes w Practice w Objective 17- 18 notes.

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Presentation transcript:

Today’s Agenda w Objective notes w Practice w Objective notes

Immune System Day 6 A single event can awaken within us a stranger totally unknown to us. Saint-Exupery

wAwAntibody structure

Antibodies w 2 heavy chains (450 amino acids) w 2 light chains (220 amino acids w Connected by a (S-S) disulfide bridge. w The whole protein has 1340 amino acids.

Objective 14 wAwActive immunity is acquired during an infection or from a vaccination.

Obj.14 continued wPwPassive immunity is given when a donor’s antibodies are injected into the blood- stream or from mother.

Obj Classes of Antibodies w IgA (immunoglobulin A) w IgG (these all differ by w IgM structure and function) w IgD w IgE

Obj. 16 Function of Antibodies w Complement fixation w Antigen neutralization w Precipitation w Agglutination

Neutralization by Antibodies

Agglutination by Antibodies

Precipitation of Dissolved Antigens by Antibodies

Activation of Complement By Antibodies

Practice

Objective 17: Clonal Selection of T cells w T cell growth is stimulated by the protein displayed on the surface of the macrophage. w Some become active killers others become memory T cells.

Obj. 18: Roll of T Cells w Cytotoxic T cells attack and lyse infected cells. w Helper T cells release interleukin. w Suppressor T stop immune response

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