21. The Immune System

Complement activation promotes all of the following except:

a. Cell lysis

b. Inflammation

c. Opsonization

d. Interferon release

e. Chemotaxis of neutrophils and other cell

Which of the following functions is/are performed by complement proteins?

a. Cell lysis

b. Opsonization

c. Enhancing inflammation

d. Only a and b

e. All of the above

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

d.Interleukin-1 is a cytokine that prevents viral replication in infected cells.

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

Eileen presents with flu-like symptoms, including fever, chills, and body aches.

c. What might it mean if lymphocytes instead of neutrophils were elevated? Explain your reasoning.

Interferons are referred to as antiviral proteins. What stimulates their production, and how do they protect uninfected cells? Which cells of the body secrete interferons?

More than one choice may apply.

Which of the following are among the most common indicators of inflammation?

a. Phagocytosis

b. Edema

c. Leukocytosis

d. Pain

Eileen presents with flu-like symptoms, including fever, chills, and body aches.

What part of the immune response is likely producing these symptoms?

Interferons are referred to as antiviral proteins. What stimulates their production, and how do they protect uninfected cells?

Compared with innate defenses, adaptive defenses

(a) Do not distinguish between one threat and another

(b) Are always present at birth

(c) Protect against threats on an individual basis

(d) Deny the entry of pathogens to the body