Exam 3 V1: BIOS 242/ BIOS242 Fundamentals
of Microbiology with Lab | Questions and verified
Answers |Latest 2026/ 2027 Update | Grade A|
100% Correct (Guaranteed Pass)—Chamberlain
The first line of defense is a surface protection composed of ____ and ____ barriers that keep
microbes from penetrating sterile body compartments
anatomical, physiological
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
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
The first line of defense includes
physical and chemical barriers
The second line of defense includes
phagocytosis, inflammation, fever, antimicrobial proteins
, Exam 3 V1: BIOS 242/ BIOS242 Fundamentals
of Microbiology with Lab | Questions and verified
Answers |Latest 2026/ 2027 Update | Grade A|
100% Correct (Guaranteed Pass)—Chamberlain
the third line of defense includes
B and T cells
What are the physical barriers on the skin?
hair follicles, sweat glands, mucous membranes
What are the chemical barriers of the skin?
lysozyme, saliva, sweat, skin's pH, hydrochloric acid, bile, resident microbiota
What are the first lines of defense in the mouth?
saliva (contains lysozyme)
Where do B cells mature?
develop and mature in red bone marrow
Where do t cells mature?
develop in bone marrow and mature in the thymus
, Exam 3 V1: BIOS 242/ BIOS242 Fundamentals
of Microbiology with Lab | Questions and verified
Answers |Latest 2026/ 2027 Update | Grade A|
100% Correct (Guaranteed Pass)—Chamberlain
What is an antigen?
foreign molecule that causes a specific immune response
What is another name for antigens?
immunogens
Where do antigens come from?
proteins and polysaccharides from cells and viruses
What are the functions of plasmid cells?
release antibodies into the tissue/blood, attach to antigens for destruction
True or false: plasmid cells can produce 2000 antibodies per second
true
What is the percentage of neutrophils circulating WBC?
55-90%
of Microbiology with Lab | Questions and verified
Answers |Latest 2026/ 2027 Update | Grade A|
100% Correct (Guaranteed Pass)—Chamberlain
The first line of defense is a surface protection composed of ____ and ____ barriers that keep
microbes from penetrating sterile body compartments
anatomical, physiological
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
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
The first line of defense includes
physical and chemical barriers
The second line of defense includes
phagocytosis, inflammation, fever, antimicrobial proteins
, Exam 3 V1: BIOS 242/ BIOS242 Fundamentals
of Microbiology with Lab | Questions and verified
Answers |Latest 2026/ 2027 Update | Grade A|
100% Correct (Guaranteed Pass)—Chamberlain
the third line of defense includes
B and T cells
What are the physical barriers on the skin?
hair follicles, sweat glands, mucous membranes
What are the chemical barriers of the skin?
lysozyme, saliva, sweat, skin's pH, hydrochloric acid, bile, resident microbiota
What are the first lines of defense in the mouth?
saliva (contains lysozyme)
Where do B cells mature?
develop and mature in red bone marrow
Where do t cells mature?
develop in bone marrow and mature in the thymus
, Exam 3 V1: BIOS 242/ BIOS242 Fundamentals
of Microbiology with Lab | Questions and verified
Answers |Latest 2026/ 2027 Update | Grade A|
100% Correct (Guaranteed Pass)—Chamberlain
What is an antigen?
foreign molecule that causes a specific immune response
What is another name for antigens?
immunogens
Where do antigens come from?
proteins and polysaccharides from cells and viruses
What are the functions of plasmid cells?
release antibodies into the tissue/blood, attach to antigens for destruction
True or false: plasmid cells can produce 2000 antibodies per second
true
What is the percentage of neutrophils circulating WBC?
55-90%
