21. The Immune System
First-Line Defenses: Chemical Barriers
21. The Immune System
First-Line Defenses: Chemical Barriers
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- Multiple ChoiceWhich type of molecule is produced by virus-infected cells to communicate to noninfected cells the presence of a virus?
- Open QuestionWhat is complement? How does it cause bacterial lysis? What are some of the other roles of complement?
- Multiple Choice
Which of the following statements about the defensive roles of saliva and gastric juices are true?
- Open QuestionAll of the following are considered innate body defenses excepta. complement,b. phagocytosis,c. antibodies,d. lysozyme,e. inflammation.
- Multiple ChoiceWhich of the following minerals needed for bacterial reproduction do the liver and spleen sequester during a fever?
- Open QuestionWhat seven defenses, present at birth, provide the body with the defensive capability known as innate (nonspecific) immunity?
- Open Question
Fill in the blanks: Injured tissue releases chemicals called______ that mediate the four cardinal signs of inflammation, which are _____, ______,_____ , and_______.
- Multiple ChoiceWhich cells do NOT have a direct role in phagocytosis?