OVERVIEW OF THE IMMUNE SYSTEM
IMMUNITY INNATE AND ADAPTIVE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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antibodies are produced by lymphocytes
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immunity depends on vaccination
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immunity is specific to one type of antigen
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no memory cells are produced
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Detailed explanation-1: -The major advantage to passive immunity is that protection is immediate, whereas active immunity takes time (usually several weeks) to develop. However, passive immunity lasts only for a few weeks or months. Only active immunity is long-lasting.
Detailed explanation-2: -Two types of immunity exist-active and passive: Active immunity occurs when our own immune system is responsible for protecting us from a pathogen. Passive immunity occurs when we are protected from a pathogen by immunity gained from someone else.
Detailed explanation-3: -Active immunity involves the production of antibodies by the body itself and the subsequent development of memory cells. Passive immunity results from the acquisition of antibodies from another source and hence memory cells are not developed.
Detailed explanation-4: -Unlike active immunity, passive immunity is short-lived (often only for a few months), because it does not involve the production and upkeep of memory cells.