Anatomy and Physiology II Practice Test

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What type of immunity is gained through the injection of antibodies made by another individual's immune system?

  1. Active natural immunity

  2. Passive natural immunity

  3. Active artificial immunity

  4. Passive artificial immunity

The correct answer is: Passive artificial immunity

The type of immunity gained through the injection of antibodies made by another individual's immune system is referred to as passive artificial immunity. This form of immunity occurs when antibodies are transferred from one person (or organism) to another, typically through medical intervention such as an injection. In the case of passive artificial immunity, the recipient's immune system does not produce the antibodies; instead, they are directly introduced into the bloodstream. This can provide immediate, though temporary, protection against specific pathogens. Examples include treatments with antivenoms or immunoglobulins. Active immunity, in contrast, requires the organism's own immune system to respond to a pathogen, producing its antibodies over time, which can be through natural infection or vaccination. Therefore, options referring to active immunity are not applicable here. Natural immunity refers to the body's own response to infections or environmental exposures, which does not pertain to the injection of pre-formed antibodies.

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