Immunology — Flashcards

Endotoxin/Lipopolysaccharide of Gram Negative Bacteria can activate the _____ system, resulting in release of C3a and C5a

The antigen receptors of T lymphocytes have one _____ and beta chain (monovalent)

_____ Lymphoid Cell Function B & T cells - Found in bloodstream, lymph nodes, spleen, submucosa, and epithelia B cells: contain markers CD19, CD20, CD21 - Mature into plasma cells - Function is to produce antibodies TH cells: contain markers CD3 and CD4 - Function is to regulate immune responses Cytotoxic T cells: contain markers CD3 and CD8 - Function is to kill infected cells NK cells - Contain markers CD16 and CD56 - Function is to kill tumor/virus cell targets or antibody-coated target cells - T cells can only bind peptides that have been processed and presented by major histocompatibility complexes (MHCs)

V(D)J recombination in heavy chains begins with _____ joining, followed by V-D/J joining

Who established the concept of humoral immunity?_____

Which is the only heat labile antibody?_____

The antigenic part of contact with the T-cell receptor is called _____.

Which T-cells are important defense mechanisms against microorganisms like Listeria monocytogenes and Mycobacterium tuberculosis?_____

What is the only heat labile antibody?_____

Polysaccharides and lipids stimulate the secretion of mainly _____ antibody.