1. What is the effector molecule of humoral immunity?
A. Antibodies
B. Cytotoxic T cells
C. Dendritic cells
D. Helper T cells
E. Plasma cells -
... [Show More] AnswerAnswer: A
Section: Introduction
Difficulty: 1
Hint: Humoral immunity is based on activated B cells.
2. The role of cell-mediated immunity is:
A. to find cells infected with intracellular pathogens.
B. to find and eliminate cells infected with intracellular pathogens.
C. to present antigens to TH cells.
D. to produce memory B cells.
E. to secrete antibodies. - AnswerAnswer: B
Section: Introduction
Difficulty: 1
Hint: Cell-mediated immunity uses T cells.
3. Cell mediated immunity includes:
A. antibodies.
B. plasma cells.
C. TC cells.
D. TH cells.
E. Both C and D - AnswerAnswer: E
Section: Introduction
Difficulty: 1
Hint: Cell-mediated immunity uses T-lineage cells.
4. Examples of cytotoxic effector cells include all of the following EXCEPT:
A. basophils.
B. eosinophils.
C. macrophages.
D. NK cells.
E. TC cells. - AnswerAnswer: A
Section: Introduction
Difficulty: 2
Hint: Cytotoxic effector cells are responsible for inducing cell death of the target cell.
5. NK T cells (NKTs) express:
A. CD4.
B. CD8.
C. CD12.
D. CD33.
E. Both A and B - AnswerAnswer: A
Section: Introduction
Difficulty: 1
Hint: TH CD expression
6. _______ describes the action of antibodies whereby antibodies bind to a pathogen and prevent the pathogen from interacting with cell receptors.
A. Antibody-dependent cell-mediated cytotoxicity
B. Antigen presentation
C. Complement fixation
D. Neutralization
E. Opsonization - AnswerAnswer: D
Section: Antibody-Mediated Effector Functions
Difficulty: 1
Hint: Blocking of receptors prevents a pathogen from invading a host cell.
7. _______ describes the recruitment of phagocytic cells by the Fab portion of an antibody.
A. Antibody-dependent cell-mediated cytotoxicity
B. Antigen presentation
C. Complement fixation
D. Neutralization
E. Opsonization - AnswerAnswer: E
Section: Antibody-Mediated Effector Functions
Difficulty: 1
Hint: Recruitment of phagocytes
8. Lysis of a pathogen by MAC formation is an example of:
A. antibody-dependent cell-mediated cytotoxicity.
B. antigen presentation.
C. complement fixation.
D. neutralization.
E. opsonization. - AnswerAnswer: C
Section: Antibody-Mediated Effector Functions
Difficulty: 2
Hint: MAC formation is a result of complement. [Show Less]