Immunology & Serology in Laboratory Medicine:
Key Concepts and Clinical Applications 2026 With
Questions And Answers Written Correctly
What are the desirable outcomes of the immune system? - correct answer
<<<<<💕💕💕✔✔Natural resistance, recovery, and acquired resistance (including vaccination).
What are the undesirable outcomes of the immune system? - correct answer
<<<<<💕💕💕✔✔Allergy (hypersensitivity), transplant rejection, and autoimmunity.
Who is Edward Jenner? - correct answer <<<<<💕💕💕✔✔A foundational figure in immunology
known for early vaccination work.
What did Louis Pasteur contribute to immunology? - correct answer <<<<<💕💕💕✔✔Advanced
vaccine concepts and established the Pasteur Institute for rabies treatment.
What is the difference between innate and adaptive immunity? - correct answer
<<<<<💕💕💕✔✔Innate immunity is immediate and nonspecific; adaptive immunity is slower,
antigen-specific, and generates memory.
What are the first line defenses of the immune system? - correct answer <<<<<💕💕💕✔✔Intact
skin, mucous membranes, mechanical removal, and chemical factors in secretions.
What cells are involved in innate immunity? - correct answer <<<<<💕💕💕✔✔Epithelial barriers,
macrophages, dendritic cells, mast cells, neutrophils, eosinophils, basophils, monocytes, NK cells, and
innate lymphoid cells.
, What is the role of the thymus in the immune system? - correct answer <<<<<💕💕💕✔✔It is key
for T-cell maturation.
What are PAMPs and PRRs? - correct answer <<<<<💕💕💕✔✔PAMPs are pathogen-associated
molecular patterns recognized by PRRs (pattern recognition receptors).
What are the three activation pathways of the complement system? - correct answer
<<<<<💕💕💕✔✔Classical, alternative, and mannose-binding lectin (MBL) pathways.
What activates the classical pathway of the complement system? - correct answer
<<<<<💕💕💕✔✔Immune complexes, certain microbes, apoptotic cells, and C-reactive protein
(CRP).
What is hereditary angioedema (HAE)? - correct answer <<<<<💕💕💕✔✔A condition involving
qualitative or quantitative deficiency of C1 esterase inhibitor (C1-INH).
What are cytokines? - correct answer <<<<<💕💕💕✔✔Signaling molecules produced rapidly after
cell activation that regulate immunity and inflammation.
Define immunogen. - correct answer <<<<<💕💕💕✔✔A macromolecule that triggers an adaptive
immune response and reacts with produced antibodies.
What is an antigen? - correct answer <<<<<💕💕💕✔✔Any substance specifically bound by an
antibody or T-cell receptor.
What is a hapten? - correct answer <<<<<💕💕💕✔✔A low molecular weight molecule that can
bind antibody but typically requires a carrier to stimulate an immune response.
What is an epitope? - correct answer <<<<<💕💕💕✔✔The specific antigenic determinant
recognized by an antibody or T-cell receptor.
Key Concepts and Clinical Applications 2026 With
Questions And Answers Written Correctly
What are the desirable outcomes of the immune system? - correct answer
<<<<<💕💕💕✔✔Natural resistance, recovery, and acquired resistance (including vaccination).
What are the undesirable outcomes of the immune system? - correct answer
<<<<<💕💕💕✔✔Allergy (hypersensitivity), transplant rejection, and autoimmunity.
Who is Edward Jenner? - correct answer <<<<<💕💕💕✔✔A foundational figure in immunology
known for early vaccination work.
What did Louis Pasteur contribute to immunology? - correct answer <<<<<💕💕💕✔✔Advanced
vaccine concepts and established the Pasteur Institute for rabies treatment.
What is the difference between innate and adaptive immunity? - correct answer
<<<<<💕💕💕✔✔Innate immunity is immediate and nonspecific; adaptive immunity is slower,
antigen-specific, and generates memory.
What are the first line defenses of the immune system? - correct answer <<<<<💕💕💕✔✔Intact
skin, mucous membranes, mechanical removal, and chemical factors in secretions.
What cells are involved in innate immunity? - correct answer <<<<<💕💕💕✔✔Epithelial barriers,
macrophages, dendritic cells, mast cells, neutrophils, eosinophils, basophils, monocytes, NK cells, and
innate lymphoid cells.
, What is the role of the thymus in the immune system? - correct answer <<<<<💕💕💕✔✔It is key
for T-cell maturation.
What are PAMPs and PRRs? - correct answer <<<<<💕💕💕✔✔PAMPs are pathogen-associated
molecular patterns recognized by PRRs (pattern recognition receptors).
What are the three activation pathways of the complement system? - correct answer
<<<<<💕💕💕✔✔Classical, alternative, and mannose-binding lectin (MBL) pathways.
What activates the classical pathway of the complement system? - correct answer
<<<<<💕💕💕✔✔Immune complexes, certain microbes, apoptotic cells, and C-reactive protein
(CRP).
What is hereditary angioedema (HAE)? - correct answer <<<<<💕💕💕✔✔A condition involving
qualitative or quantitative deficiency of C1 esterase inhibitor (C1-INH).
What are cytokines? - correct answer <<<<<💕💕💕✔✔Signaling molecules produced rapidly after
cell activation that regulate immunity and inflammation.
Define immunogen. - correct answer <<<<<💕💕💕✔✔A macromolecule that triggers an adaptive
immune response and reacts with produced antibodies.
What is an antigen? - correct answer <<<<<💕💕💕✔✔Any substance specifically bound by an
antibody or T-cell receptor.
What is a hapten? - correct answer <<<<<💕💕💕✔✔A low molecular weight molecule that can
bind antibody but typically requires a carrier to stimulate an immune response.
What is an epitope? - correct answer <<<<<💕💕💕✔✔The specific antigenic determinant
recognized by an antibody or T-cell receptor.
