Multiple Choice
Which nonspecific defense cells specialize in attacking cancer cells and virus-infected cells?
21. The Immune System
First-Line Defenses: Chemical Barriers
Back21. The Immune System
First-Line Defenses: Chemical Barriers
- 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_______.
- Open QuestionCapillary permeability increases and plasma proteins leak into the interstitial fluid as part of the inflammatory process. Why is this desirable?
- Open QuestionThe most beneficial effect of fever is that it (a) inhibits the spread of some bacteria and viruses, (b) increases the metabolic rate by up to 10 percent, (c) stimulates the release of pyrogens, (d) achieves a and b.
- Open Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
b. Phagocytic cells of innate immunity include NK cells and basophils.
- Open QuestionMultiple ChoiceMore than one choice may apply.Chemical mediators of inflammation includea. interferon.b. complement.c. histamine.d. antibodies.
- Multiple ChoiceWhich cells do NOT have a direct role in phagocytosis?
- Multiple ChoiceThe first step in inflammation is __________.
- Multiple Choice
Defensin antimicrobial peptides kill microbes by: