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BIOS 242: EXAM 3 CHAMBERLAIN ACTUAL
EXAM PREP 2026 150 QUESTIONS AND
CORRECT DETAILED ANSWERS ALREADY A
GRADED WITH EXPERT FEEDBACK|NEW AND
REVISED
1. The first line of defense is a surface protection composed of and
barriers that keep microbes from penetrating sterile body compartments:
- anatomical, physiological
2. The second line of defense is a and system that comes
immediately into play if infectious agents make it past the surface
defenses: cellular, chemical
3. The third line of defense include that must be developed uniquely
for each microbe through the action of specialized white blood cells:
specific host defenses
4. The first line of defense includes: physical and chemical barriers
5. The second line of defense includes: phagocytosis, inflammation,
fever, antimicrobial proteins
6. The third line of defense includes: b and t cells
7. What are the physical barriers on the skin?: hair follicles, sweat
glands, mucous membranes
8. What are the chemical barriers of the skin?: lysozyme, saliva,
sweat, skin's ph, hydrochloric acid, bile, resident microbiota
9. What are the first lines of defense in the mouth?: saliva (contains
lysozyme)
10. Where do b cells mature?: develop and mature in red bone marrow
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11. Where do t cells mature?: develop in bone marrow and mature in
the thymus
12. What is an antigen?: foreign molecule that causes a specific
immune response
13. What is another name for antigens?: immunogens
14. Where do antigens come from?: proteins and polysaccharides from
cells and viruses
15. What are the functions of plasmid cells?: release antibodies into
the tissue/blood, attach to antigens for destruction
16. True or false: plasmid cells can produce 2000 antibodies per
second: true
17. What is the percentage of neutrophils circulating wbc?: 55-90%
18. What is the percentage of eosinophils circulating wbc?: 2-4%
19. What is the percentage of basophils circulating wbc?: less than
0.5%
20. What is the percentage of lymphocytes circulating wbc?: 20-35%
21. What is the percentage of monocytes circulating wbc?: 3-7%
22. What is the function of neutrophils?: production of toxic chemicals
and phagocytosis
23. Neutrophils react early in the response to bacteria, foreign
materials, and damaged tissue: inflammatory
24. A common sign of a bacterial infection is a high number of:
neutrophils
25. what is the function of eosinophils?: attack and destroy large
eukaryotic pathogens
BIOS 242: EXAM 3 CHAMBERLAIN ACTUAL
EXAM PREP 2026 150 QUESTIONS AND
CORRECT DETAILED ANSWERS ALREADY A
GRADED WITH EXPERT FEEDBACK|NEW AND
REVISED
1. The first line of defense is a surface protection composed of and
barriers that keep microbes from penetrating sterile body compartments:
- anatomical, physiological
2. The second line of defense is a and system that comes
immediately into play if infectious agents make it past the surface
defenses: cellular, chemical
3. The third line of defense include that must be developed uniquely
for each microbe through the action of specialized white blood cells:
specific host defenses
4. The first line of defense includes: physical and chemical barriers
5. The second line of defense includes: phagocytosis, inflammation,
fever, antimicrobial proteins
6. The third line of defense includes: b and t cells
7. What are the physical barriers on the skin?: hair follicles, sweat
glands, mucous membranes
8. What are the chemical barriers of the skin?: lysozyme, saliva,
sweat, skin's ph, hydrochloric acid, bile, resident microbiota
9. What are the first lines of defense in the mouth?: saliva (contains
lysozyme)
10. Where do b cells mature?: develop and mature in red bone marrow
, 2|Page
11. Where do t cells mature?: develop in bone marrow and mature in
the thymus
12. What is an antigen?: foreign molecule that causes a specific
immune response
13. What is another name for antigens?: immunogens
14. Where do antigens come from?: proteins and polysaccharides from
cells and viruses
15. What are the functions of plasmid cells?: release antibodies into
the tissue/blood, attach to antigens for destruction
16. True or false: plasmid cells can produce 2000 antibodies per
second: true
17. What is the percentage of neutrophils circulating wbc?: 55-90%
18. What is the percentage of eosinophils circulating wbc?: 2-4%
19. What is the percentage of basophils circulating wbc?: less than
0.5%
20. What is the percentage of lymphocytes circulating wbc?: 20-35%
21. What is the percentage of monocytes circulating wbc?: 3-7%
22. What is the function of neutrophils?: production of toxic chemicals
and phagocytosis
23. Neutrophils react early in the response to bacteria, foreign
materials, and damaged tissue: inflammatory
24. A common sign of a bacterial infection is a high number of:
neutrophils
25. what is the function of eosinophils?: attack and destroy large
eukaryotic pathogens
