21. The Immune System

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

NK cells are cytotoxic cells that lyse and kill cancer cells and cells infected with certain viruses.

The process by which neutrophils squeeze through capillary walls in response to inflammatory signals is called:

a. Diapedesis

b. Chemotaxis

c. Margination

d. Opsonization

Give a function for each of the following:

(l) Interleukins

(m) Tumor necrosis factor

(n) Colony-stimulating factors

More than one choice may apply.

Against which of the following will interferon do some good?

a. Infection of body cells by a virus

b. Circulating free viruses

c. Some types of cancer

d. Bacterial infection

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

Lysozyme is effective at destroying bacteria pathogens because it does what?

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

The ____________ glands create sebum which makes the skin more __________ which decreases microbial growth.

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.

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?