Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892



Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

After Sally punctured her hand with a dirty nail, she received both a vaccine and someone else’s antibodies against tetanus toxin. The immunity conferred here is:

both active and passive.

active only.

passive only.

first active; later passive.


Summary Introduction


Immunity is a reasonable state of the higher organisms, which have sufficient biological defense system to ward off disease, infection, or other pathogenic infection. The immune system has innate and adaptive immune systems.


Justification for the correct answer:

Option (a) is both active and passive immunity. This is a true statement as passive immunity is transfer of prepared antibodies (active immunity) from one person to another as represented by the transfer of anti-tetanus antibodies to patient in question. On the other hand, active immunity frequently incorporates both humoral and cell-mediated immunity. Here, vaccination indicate active immunity. Hence, option (a) is correct.

Justification for the incorrect answers:

Option (b) is active only. This is false as the transfer of anti-tetanus antibodies from another person represents passive immunity...

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