19. Innate Immunity

Where are bacteria killed by enzymes and toxic substances once ingested by a white blood cell?

Which of the following statements about phagosomes and phagolysosomes are true?

Which of the following statements about phagocytosis is incorrect?

Some pathogens create C5a peptidase, an enzyme that destroys C5a proteins. Which of the following is not a benefit that the pathogen would experience after destroying C5a proteins?

DRAW IT Label on the figure the following processes that result in phagocytosis: margination, diapedesis, adherence, and phagolysosome formation.

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Patients with X-linked chronic granulomatous disease are susceptible to infections because their neutrophils don’t generate an oxidative burst. What is the relation of the oxidative burst to infection?

Legionella uses C3b receptors to enter monocytes. This

a. prevents phagocytosis.

b. degrades complement.

c. inactivates complement.

d. prevents inflammation.

e. prevents cytolysis.

Chlamydia can prevent the formation of phagolysosomes and therefore can

a. avoid being phagocytized.

b. avoid destruction by complement.

c. prevent adherence.

d. avoid being digested.

e. none of the above