MT AAB IMMUNOLOGY EXAM ACTUAL EXAM QUESTIONS AND ANSWERS ALREADY GRADED A+| 100%
VERIFIED SOLUTIONS
Core Domains
Natural Immunity and External Defenses
Immunogenicity, Antigens, and Haptens
Cellular Immunity (T Cells, B Cells, NK Cells)
Humoral Immunity and Immunoglobulins (Structure, Function, Classes)
Complement System (Classical, Lectin, Alternative Pathways)
Antigen-Antibody Reactions and Serological Testing
Hypersensitivity Reactions (Types I–IV)
Autoimmune Diseases and Immunodeficiencies
Transplantation Immunology and Tumor Immunology
Laboratory Techniques (ELISA, Western Blot, Immunofluorescence, etc.)
Introduction
,This comprehensive practice examination is designed to prepare candidates for the Medical Technologist (MT)
Immunology certification exam administered by the American Association of Bioanalysts (AAB) Board of Registry.
The assessment evaluates knowledge across all core immunology domains, including natural and adaptive
immunity, immunoglobulins, complement, serological testing, hypersensitivity, autoimmunity, and laboratory
techniques. Through multiple-choice questions and clinical scenarios, candidates demonstrate the theoretical
knowledge and practical laboratory skills required for high-complexity immunology and serology testing. This
examination serves as a critical tool for assessing readiness for the MT(AAB) certification, emphasizing clinical
application, diagnostic reasoning, and professional standards in the immunology laboratory.
SECTION ONE: QUESTIONS 1–100
1. Which of the following is NOT an external defense mechanism of natural immunity?
A. Skin
B. Mucus
C. Bursa of Fabricius
D. Lysozyme in tears
🟢C
🔴 RATIONALE: The Bursa of Fabricius is a primary lymphoid organ in birds responsible for B lymphocyte
maturation, not an external defense mechanism. Skin, mucus, and lysozyme are physical and chemical barriers
,of innate immunity.
2. Which cell type is primarily responsible for the humoral immune response?
A. T lymphocyte
B. B lymphocyte
C. Natural killer cell
D. Mast cell
🟢B
🔴 RATIONALE: B lymphocytes are responsible for the humoral immune response through the production of
antibodies. T lymphocytes mediate cellular immunity, NK cells provide innate cytotoxicity, and mast cells are
involved in allergic responses.
3. Which of the following immunoglobulins is the first to appear after initial antigen exposure?
A. IgG
B. IgA
C. IgM
D. IgE
🟢C
, 🔴 RATIONALE: IgM is the first immunoglobulin produced during a primary immune response. It is a pentamer
and is highly effective at activating complement.
4. The predominant immunoglobulin found in mucosal secretions is:
A. IgG
B. IgA
C. IgM
D. IgD
🟢B
🔴 RATIONALE: Secretory IgA is the predominant immunoglobulin in mucosal secretions such as saliva, tears,
and gastrointestinal fluids, providing localized immune protection.
5. Which immunoglobulin is associated with allergic reactions and binds to mast cells and basophils?
A. IgG
B. IgA
C. IgM
D. IgE
🟢D
VERIFIED SOLUTIONS
Core Domains
Natural Immunity and External Defenses
Immunogenicity, Antigens, and Haptens
Cellular Immunity (T Cells, B Cells, NK Cells)
Humoral Immunity and Immunoglobulins (Structure, Function, Classes)
Complement System (Classical, Lectin, Alternative Pathways)
Antigen-Antibody Reactions and Serological Testing
Hypersensitivity Reactions (Types I–IV)
Autoimmune Diseases and Immunodeficiencies
Transplantation Immunology and Tumor Immunology
Laboratory Techniques (ELISA, Western Blot, Immunofluorescence, etc.)
Introduction
,This comprehensive practice examination is designed to prepare candidates for the Medical Technologist (MT)
Immunology certification exam administered by the American Association of Bioanalysts (AAB) Board of Registry.
The assessment evaluates knowledge across all core immunology domains, including natural and adaptive
immunity, immunoglobulins, complement, serological testing, hypersensitivity, autoimmunity, and laboratory
techniques. Through multiple-choice questions and clinical scenarios, candidates demonstrate the theoretical
knowledge and practical laboratory skills required for high-complexity immunology and serology testing. This
examination serves as a critical tool for assessing readiness for the MT(AAB) certification, emphasizing clinical
application, diagnostic reasoning, and professional standards in the immunology laboratory.
SECTION ONE: QUESTIONS 1–100
1. Which of the following is NOT an external defense mechanism of natural immunity?
A. Skin
B. Mucus
C. Bursa of Fabricius
D. Lysozyme in tears
🟢C
🔴 RATIONALE: The Bursa of Fabricius is a primary lymphoid organ in birds responsible for B lymphocyte
maturation, not an external defense mechanism. Skin, mucus, and lysozyme are physical and chemical barriers
,of innate immunity.
2. Which cell type is primarily responsible for the humoral immune response?
A. T lymphocyte
B. B lymphocyte
C. Natural killer cell
D. Mast cell
🟢B
🔴 RATIONALE: B lymphocytes are responsible for the humoral immune response through the production of
antibodies. T lymphocytes mediate cellular immunity, NK cells provide innate cytotoxicity, and mast cells are
involved in allergic responses.
3. Which of the following immunoglobulins is the first to appear after initial antigen exposure?
A. IgG
B. IgA
C. IgM
D. IgE
🟢C
, 🔴 RATIONALE: IgM is the first immunoglobulin produced during a primary immune response. It is a pentamer
and is highly effective at activating complement.
4. The predominant immunoglobulin found in mucosal secretions is:
A. IgG
B. IgA
C. IgM
D. IgD
🟢B
🔴 RATIONALE: Secretory IgA is the predominant immunoglobulin in mucosal secretions such as saliva, tears,
and gastrointestinal fluids, providing localized immune protection.
5. Which immunoglobulin is associated with allergic reactions and binds to mast cells and basophils?
A. IgG
B. IgA
C. IgM
D. IgE
🟢D
