BIO 205 Exam 3 Questions With Complete Solutions
List First and Second Line of Defense for INNATE IMMUNITY - ANSWER -intact skin
-mucous membranes
-normal microbiota
-natural killer cells and phagocytic white blood cells
-inflammation
-fever
-antimicrobial substances
List Third Line of Defense for ACQUIRED IMMUNITY - ANSWER -specialized lymphocytes: T cells
and B cells
-antibodies
A child falls and suffers a deep cut on her leg. The cut went through her skin and she is bleeding.
Which of the following defense mechanisms will participate in eliminating contaminating
microbes?
A) mucociliary escalator
B) normal skin flora
C) phagocytosis in the inflammatory response
D) acidic skin secretions
E) lysozyme - ANSWER C) phagocytosis in the inflammatory response
Normal microbiota provide protection from infection in each of the following ways EXCEPT
,A) they produce antibacterial chemicals.
B) they compete with pathogens for nutrients.
C) they make the chemical environment unsuitable for nonresident bacteria.
D) they produce lysozyme.
E) they change the pH of the environment - ANSWER D) they produce lysozyme.
Innate immunity includes all of the following EXCEPT
A) phagocytosis.
B) inflammation.
C) production of antibody.
D) production of interferon.
E) activation of complement - ANSWER C) production of antibody.
Lysozyme and the antibiotic penicillin have similar mechanisms of action in that they both cause
damage to the bacterial
A) cell membrane.
B) capsule.
C) cell wall.
D) DNA.
E) ribosomes. - ANSWER C) cell wall.
Which of the following is the best definition of antigen?
A) something foreign in the body
B) a chemical that elicits an antibody response and can combine with these antibodies
C) a chemical that combines with antibodies
D) a pathogen
, E) a protein that combines with antibodies - ANSWER A) something foreign in the body
B) a chemical that elicits an antibody response and can combine with these antibodies
Which of the following destroys virus-infected cells?
A) cytotoxic T killer
B) Treg
C) TH
D) dendritic cells
E) B cells - ANSWER A) cytotoxic T killer
Which antibody is found in tears
A. IgA
B. IgG
C. IgM
D. IgD - ANSWER A. IgA
Which antibody accounts for 70-80% of all antibodies in the human immune system
A. IgA
B. IgG
C. IgM
D. IgD - ANSWER B. IgG
Which antibody is involved in allergies
A. IgA
B. IgG
C. IgM
List First and Second Line of Defense for INNATE IMMUNITY - ANSWER -intact skin
-mucous membranes
-normal microbiota
-natural killer cells and phagocytic white blood cells
-inflammation
-fever
-antimicrobial substances
List Third Line of Defense for ACQUIRED IMMUNITY - ANSWER -specialized lymphocytes: T cells
and B cells
-antibodies
A child falls and suffers a deep cut on her leg. The cut went through her skin and she is bleeding.
Which of the following defense mechanisms will participate in eliminating contaminating
microbes?
A) mucociliary escalator
B) normal skin flora
C) phagocytosis in the inflammatory response
D) acidic skin secretions
E) lysozyme - ANSWER C) phagocytosis in the inflammatory response
Normal microbiota provide protection from infection in each of the following ways EXCEPT
,A) they produce antibacterial chemicals.
B) they compete with pathogens for nutrients.
C) they make the chemical environment unsuitable for nonresident bacteria.
D) they produce lysozyme.
E) they change the pH of the environment - ANSWER D) they produce lysozyme.
Innate immunity includes all of the following EXCEPT
A) phagocytosis.
B) inflammation.
C) production of antibody.
D) production of interferon.
E) activation of complement - ANSWER C) production of antibody.
Lysozyme and the antibiotic penicillin have similar mechanisms of action in that they both cause
damage to the bacterial
A) cell membrane.
B) capsule.
C) cell wall.
D) DNA.
E) ribosomes. - ANSWER C) cell wall.
Which of the following is the best definition of antigen?
A) something foreign in the body
B) a chemical that elicits an antibody response and can combine with these antibodies
C) a chemical that combines with antibodies
D) a pathogen
, E) a protein that combines with antibodies - ANSWER A) something foreign in the body
B) a chemical that elicits an antibody response and can combine with these antibodies
Which of the following destroys virus-infected cells?
A) cytotoxic T killer
B) Treg
C) TH
D) dendritic cells
E) B cells - ANSWER A) cytotoxic T killer
Which antibody is found in tears
A. IgA
B. IgG
C. IgM
D. IgD - ANSWER A. IgA
Which antibody accounts for 70-80% of all antibodies in the human immune system
A. IgA
B. IgG
C. IgM
D. IgD - ANSWER B. IgG
Which antibody is involved in allergies
A. IgA
B. IgG
C. IgM
