NU 551 Unit 2 Exam | Questions with 100% Correct
Answers | Verified | Latest Update 2026/2027
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Practice questions for this set
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block H2 receptors in the stomach to prevent the release of acid to treat
heartburn, peptic ulcers, and GERD
Choose an answer
1 Innate Immunity 2 H2 Blockers
3 Antimicrobial peptides 4 Normal Flora is Now Known As
Don't know?
Terms in this set (138)
,Innate Immunity Natural barriers and inflammation
Present at birth
Initial response to injury
Adaptive/ Acquired Immunity Immunity which develops over a life time
Long term protection against specific invaders
Involves memory
Examples Of Innate Immunity Skin
Epithelial cells in upper respiratory tract
GI tract through vomit & defecation
1st 2nd and 3rd Line of Defense Physical and biochemical barriers and the human
micro biome
Inflammatory response
Adaptive Immunity
Normal Flora is Now Known As normal microbiome
Normal Microbiome colonized combination of bacteria and fungi
unique to anatomical location and individual
Commensal benefiting the microorganism
, Mutualistic benefiting both the microorganism and the body
Functions of the Microbiome -produce enzymes
-synthesize metabolites
-release antibacterial substances
-competes w/pathogens for nutrients, block
attachments to epithelium, first step infectious
process
-induces gut-associated typhoid tissue
-contributes to communication btw brain and GI
tract
Opportunistic Pathogens harmless under normal conditions
-can cause disease when defense mechanisms
lower
Lysozyme enzyme which attacks the cell walls of gram-
positive bacteria
Where are lysozymes found -perspiration
-tears
-saliva
Antimicrobial peptides Short peptides which kill and inhibit growth of
bacteria, fungi & viruses
Defensins Antimicrobial peptides produced by neutrophils
and epithelial cells that defend against bacterial
infection by disrupting bacterial membranes
Collectins Soluble glycoproteins that facilitate the ability of
macrophages to recognize and kill pathogenic
microorganisms and can activate the lectin
pathway of the complement system.
Answers | Verified | Latest Update 2026/2027
Save
Practice questions for this set
Learn 1 /7 Study using Learn
block H2 receptors in the stomach to prevent the release of acid to treat
heartburn, peptic ulcers, and GERD
Choose an answer
1 Innate Immunity 2 H2 Blockers
3 Antimicrobial peptides 4 Normal Flora is Now Known As
Don't know?
Terms in this set (138)
,Innate Immunity Natural barriers and inflammation
Present at birth
Initial response to injury
Adaptive/ Acquired Immunity Immunity which develops over a life time
Long term protection against specific invaders
Involves memory
Examples Of Innate Immunity Skin
Epithelial cells in upper respiratory tract
GI tract through vomit & defecation
1st 2nd and 3rd Line of Defense Physical and biochemical barriers and the human
micro biome
Inflammatory response
Adaptive Immunity
Normal Flora is Now Known As normal microbiome
Normal Microbiome colonized combination of bacteria and fungi
unique to anatomical location and individual
Commensal benefiting the microorganism
, Mutualistic benefiting both the microorganism and the body
Functions of the Microbiome -produce enzymes
-synthesize metabolites
-release antibacterial substances
-competes w/pathogens for nutrients, block
attachments to epithelium, first step infectious
process
-induces gut-associated typhoid tissue
-contributes to communication btw brain and GI
tract
Opportunistic Pathogens harmless under normal conditions
-can cause disease when defense mechanisms
lower
Lysozyme enzyme which attacks the cell walls of gram-
positive bacteria
Where are lysozymes found -perspiration
-tears
-saliva
Antimicrobial peptides Short peptides which kill and inhibit growth of
bacteria, fungi & viruses
Defensins Antimicrobial peptides produced by neutrophils
and epithelial cells that defend against bacterial
infection by disrupting bacterial membranes
Collectins Soluble glycoproteins that facilitate the ability of
macrophages to recognize and kill pathogenic
microorganisms and can activate the lectin
pathway of the complement system.
