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True or False: An opportunistic pathogen causes disease when the host’s defenses are compromised.

___________ are made from inactivated bacterial exotoxins.

______________ process pathogens and display antigens to activate helper T-cells. 

Matching: Match each type of antibody with its description. 

Products of white blood cells or pathogens that are capable of initiating a fever are ____.

During phagocytosis, the killing and digestion of pathogens takes place ____________.

To initiate an infection, a pathogen must enter the body through a characteristic route called the _________.

True or False: Interferon reactions are part of the third line of defense. 

True or False: Pyrogens trigger fevers. 

Hyaluronidase is an example of an _____________ that allows some bacterial pathogens to digest connective tissue.