Immune System: B Cells, Diseases, and Cytokines - Prof. Mibel,Latest 2025/2026 Exams of Health, psychology|Graded A+|Reliable A+ Certified Pass

Immune System: B Cells,
Diseases, and Cytokines - Prof.
Mibel,Latest 2025/2026 Exams
of Health, psychology|Graded
A+|Reliable A+ Certified Pass
Role of the immune system - ANSWERS--to defend body against foreign invaders

-distinguishe between self and foreign substance (antigens)



What is immunity - ANSWERS-body's resistance to injury from invading organism:
acquired from mom at birth, disease, vaccinations and inoculations



two types of immunity - ANSWERS-nonspecific, innate, natural

specific, acquired



nonspecific immunity - ANSWERS--"natural immunity"

-all purpose cells that attack multiple pathogens

-multiple lines of defense (first: anatomical barrier)

-key components: phagocytes, histamines, macrophages, inflammatory response,
anatomical barrier

, phagocytosis - ANSWERS-what antigens may face if they get past barriers

-attacking of foreign particles by cells of immune system

-certain white blood cells (phagocytes) ingest microbes

-phagocytic cells: granulocytes, neutrophils, macrophages



Cytokines - ANSWERS-dangerous when too many released (macrophages-cell
eaters)



inflammatory response of nonspecific immunity - ANSWERS--process to restore
tissues damage by invaders

-cells release histamines which increases blood flow

-phaocytes rush to the site of the wound

-causes warmth and redness

-blood clots form which isolates microbes



specific immunity - ANSWERS--acquired

-specific to one type of invader

-slower

-lymphocytes and antibodies carry out these immune responses: t-cells and b-
cells



disorders of immune system - ANSWERS--aids