Immunology — Flashcards

Flashcard 81: Which is the only heat labile antibody?_____

Answer: IgE

Flashcard 82: Which antibodies serve as recognition receptors for antigens on naive B cells?

Answer: IgM and IgD

Extra: Surface IgM and IgD serve as the B-cell receptors (BCR) on naive B cells for antigen recognition.

Flashcard 83: Which T-helper cells are active against extracellular bacteria and fungi?_____

Answer: Th17

Flashcard 84: _____ T cells migrate preferentially to respiratory organs, skin, and peritoneal cavity

Answer: Gamma-delta

Flashcard 85: Which antibody is mainly responsible for precipitation?_____

Answer: IgG

Flashcard 86: Which type of TCR recognizes antigens without the requirement of MHC?

Answer: γδ (Gamma-delta) T cells

Extra: Most T cells are αβ T cells which require MHC-restricted antigen presentation. In contrast, γδ T cells (Gamma-delta T cells) can recognize antigens (including non-peptide antigens like lipids and phosphoantigens) directly without the requirement for MHC molecules.

Flashcard 87: An immune ring (Wesseley) may be seen around the fungal  ulcer due to deposition of the _____

Answer: immune complexes

Flashcard 88: Who established the concept of humoral immunity?_____

Answer: Paul Ehrlich

Flashcard 89: Which antibody is mainly responsible for agglutination?_____

Answer: IgM

Flashcard 90: _____ immunity occurs when transfer factor is given.

Answer: Adoptive