Active immunity is a natural process, whereas passive immunity is generated artificially.
Indicate whether this statement is true or false.
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Question 2) In passive immunity, the individual has not had an antigenic challenge.
Indicate whether this statement is true or false.
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Question 3) The immunity that occurs as a result of a vaccination is _________ immunity.
A. active
B. passive
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Question 4) Passive immunity lasts
A. from days to weeks, and involves development of memory cells.
B. from days to weeks, and does not involve development of memory cells.
C. from years to a lifetime, and involves the development of memory cells.
D. from years to a lifetime, and does not involve development of memory cells.
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Question 5) A secondary response to an infectious agent has a _______ latent phase than a primary response has.
A. longer
B. shorter
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Question 6) Some antibodies cross the placenta.
Indicate whether this statement is true or false.
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Question 7) Vaccines are effective because they
A. immediately stimulate cellular immunity to eliminate all of the pathogen in the body.
B. inhibit antibodies from having secondary responses.
C. stimulate the development of immunologic memory.
D. increase the number of natural killer cells while decreasing the numbers of T and B cells.
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Question 8) Elevated antibody production during a primary response generally lasts for months or years, whereas antibody production in secondary responses decreases to baseline level generally within a couple of weeks.
Indicate whether this statement is true or false.
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Question 9) The function of helper T-lymphocytes is to
A. initiate and oversee the immune response.
B. turn off the immune response once it has been activated.
C. secrete toxins to kill or disable pathogens.
D. trigger cell death by disrupting metabolic activities.
E. All choices are correct.
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Question 10) When compared to a primary response, the antibody levels in a secondary response
A. rise more rapidly and with a greater proportion of IgG antibodies.
B. rise more rapidly and with a smaller proportion of IgG antibodies.
C. rise more gradually and with a greater proportion of IgG antibodies.
D. rise more gradually and with a smaller proportion of IgG antibodies.
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