UPDATED 2025/2026 Exam 2
With Complete QUESTIONS AND
SURE VERIFIED SOLUTIONS
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1. Immunity - ANSWER ✔ The general ability of a host to resist a
particular disease/infection
2. Immunology - ANSWER ✔ The science concerned with immune
responses
3. Dendritic cells - ANSWER ✔ Present in small numbers as
"guards" of the immune system all over the body;
contact/phagocytose/ processes antigens (antigen presentation)
4. APCs - ANSWER ✔ antigen presenting cells (macrophages,
dendritic cells, B cells)
,5. B-cells - ANSWER ✔ Mature in the bone marrow; differentiate
into plasma cells (which produce antibodies) or memory cells upon
activation by an antigen
6. T-cells - ANSWER ✔ Mature in the thymus; differentiate into
helper T-cells, CTLs, or memory cells upon activation by an
antigen; produce cytokines
7. Natural killer cells - ANSWER ✔ Non-phagocytic granular
lymphocytes; kill any cell that does not have a normal MHC-I
receptor; can bind to antibodies and lyse pathogens via antibody-
dependent cell-mediated cytotoxity (ADCC)
8. Thymus and bone marrow - ANSWER ✔ Primary lymphoid
organs; places where lymphocytes mature and differentiate
9. Nonspecific immune response - ANSWER ✔ Innate; the first line
of defense that offers resistance to any foreign material; has no
memory
10. Specific immune response - ANSWER ✔ Acquired/adaptive;
offers resistance to a specific antigen; has a memory that will cause
second exposure to be dealt with more quickly/effectively
, 11. Antigen - ANSWER ✔ A foreign substance that evokes an
immune response; an ANTIbody GENerator
12. Hematopoiesis - ANSWER ✔ The development of WBCs in
the bone marrow; all WBCs that mature in the bone marrow join
the innate immune system while all WBCs that mature outside of
the bone marrow join the adaptive immune system
13. Erythrocytes - ANSWER ✔ The most abundant cell found in
the blood (RBC)
14. leukocytes - ANSWER ✔ white blood cells; arise from
pluripotent stem cells (granulocyte and agranulocytes)
15. Neutrophils - ANSWER ✔ The most abundant WBC (60%);
highly phagocytic, circulate in blood, (use lytic enzymes and
reactive oxygen metabolites from granules to kill ingested
pathogens)
16. Lymphocytes - ANSWER ✔ 30% of WBCs; differentiate into
T-cells, B-cells, and NK cells
17. Monocytes - ANSWER ✔ 6% of WBCs; phagocytic; after 8
hours of circulation, mature into macrophages upon arrival to
specific tissues