Question 1

To infect a cell,HIV must

Accepted Answer

A)  bind both CD4 and a cytokine receptor.
B)  bind both CD8 and a cytokine receptor.
C)  bind both CD8 and a class I MHC protein.
D)  kill cytotoxic T cells and bind CD4.E) B) and C)
F) B) and D)

Question 2

Which option would be the LEAST effective initial line of defense against pathogens?

Accepted Answer

A)  Thin,unkeratinized skin of a salamander
B)  Strong stomach acid
C)  Thick mucus coating the trachea
D)  Lysosomes in the fluid bathing the eye
E)  Exoskeleton of a beetleF) B) and D)
G) B) and C)

Question 3

Most bacteria damage the body by infecting cells and multiplying within them.

Accepted Answer

A) True 
 B)False

Question 4

During inflammation,blood vessels are constricted to prevent leakage.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following lifestyle changes would NOT boost the immune system?

Accepted Answer

A)  reducing stress by practicing yoga
B)  walking 20 minutes a day
C)  getting at least 8 hours of sleep
D)  reducing inflammation by using a cortisol supplement
E)  All of these actions will boost the immune systemF) All of the above
G) C) and E)

Question 6

Most allergy medicines contain antihistamines that block the actions of histamine.These drugs reduce cold symptoms by directly

Accepted Answer

A)  lysing virus-infected cells to prevent further propagation of the pathogen.
B)  stimulating components of the immune system through the release of cytokines.
C)  reducing the inflammation response.
D)  stimulating the production of specific antibodies.
E)  recruiting macrophages to the nasal epithelium.F) A) and D)
G) All of the above

Question 7

Class I MHC (major histocompatibility complex) is NOT important in

Accepted Answer

A)  fighting cancer.
B)  recognizing infected cells.
C)  identifying bacterial pathogens.
D)  identifying abnormal cells.
E)  presenting antigenic determinants.F) D) and E)
G) A) and D)

Question 8

Plasma cells

Accepted Answer

A)  produce antibodies.
B)  kill infected cells.
C)  mature in the thymus.
D)  remain present in the body at low levels after an infection.
E)  secrete cytokines.F) B) and D)
G) A) and C)

Question 9

What would the result be if histamine and nitric oxide were NOT secreted during a puncture injury?

Accepted Answer

A)  Helper T cells could not be signaled.
B)  The blood vessels would be more permeable.
C)  The mast cells constrict.
D)  Healing would be slower.
E)  Healing would not take place at all.F) A) and B)
G) C) and D)

Question 10

Your patient becomes sick due to an infection by the influenza virus and now has the flu.The cells which would most directly attack and lyse virally infected host cells in this case are __________.These cells mature in the __________.

Accepted Answer

A)  T cells;bone marrow
B)  B cells;thymus
C)  T cells;lymph nodes
D)  B cells;spleen
E)  T cells;thymusF) A) and E)
G) C) and D)

Question 11

Breastfeeding confers immunological benefits to the baby.

Accepted Answer

A) True 
 B)False

Exam 41: Immune Systems

Class I MHC (major histocompatibility complex) is NOT important in

Correct Answer
verified

Plasma cells

Correct Answer
verified

Most allergy medicines contain antihistamines that block the actions of histamine.These drugs reduce cold symptoms by directly

Correct Answer
verified

Which of the following lifestyle changes would NOT boost the immune system?

Correct Answer
verified

What would the result be if histamine and nitric oxide were NOT secreted during a puncture injury?

Correct Answer
verified

Most bacteria damage the body by infecting cells and multiplying within them.

Correct Answer
verified

To infect a cell,HIV must

Correct Answer
verified

Breastfeeding confers immunological benefits to the baby.

Correct Answer
verified

Which option would be the LEAST effective initial line of defense against pathogens?

Correct Answer
verified

Your patient becomes sick due to an infection by the influenza virus and now has the flu.The cells which would most directly attack and lyse virally infected host cells in this case are .These cells mature in the .

Correct Answer
verified

During inflammation,blood vessels are constricted to prevent leakage.

Correct Answer
verified

Exam 41: Immune Systems

Class I MHC (major histocompatibility complex) is NOT important in

Correct AnswerverifiedShow Answer

Plasma cells

Correct AnswerverifiedShow Answer

Most allergy medicines contain antihistamines that block the actions of histamine.These drugs reduce cold symptoms by directly

Correct AnswerverifiedShow Answer

Which of the following lifestyle changes would NOT boost the immune system?

Correct AnswerverifiedShow Answer

What would the result be if histamine and nitric oxide were NOT secreted during a puncture injury?

Correct AnswerverifiedShow Answer

Most bacteria damage the body by infecting cells and multiplying within them.

Correct AnswerverifiedShow Answer

To infect a cell,HIV must

Correct AnswerverifiedShow Answer

Breastfeeding confers immunological benefits to the baby.

Correct AnswerverifiedShow Answer

Which option would be the LEAST effective initial line of defense against pathogens?

Correct AnswerverifiedShow Answer

Your patient becomes sick due to an infection by the influenza virus and now has the flu.The cells which would most directly attack and lyse virally infected host cells in this case are __________.These cells mature in the __________.

Correct AnswerverifiedShow Answer

During inflammation,blood vessels are constricted to prevent leakage.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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Correct Answer
verified

Correct Answer
verified

Your patient becomes sick due to an infection by the influenza virus and now has the flu.The cells which would most directly attack and lyse virally infected host cells in this case are .These cells mature in the .

Correct Answer
verified

Correct Answer
verified