Idiom
To lose one's head

To become nervous
To go mad
To lose the balance
To become confused and over excited

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Idiom
Select the correct statement about active and passive immunity.

Immunological memory is established by passive immunization
Active and passive humoral immunity are both mechanisms of adaptive immunity that useantibodies
A vaccination is an example of the introduction of passive immunity into the body
The antibodies utilized in active immunity are acquired from another organism

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