Second line of defense

Question 1

Interferons (IFNs)

Answer 1

Protect uninfected host cells from viral infection.

Question 2

Complement
system

Answer 2

Causes cytolysis of microbes; promotes
phagocytosis; contributes to inflammation.

Question 3

Iron-binding
proteins

Answer 3

Iron-binding
proteins
Inhibit growth of certain bacteria by reducing
amount of available iron.

Question 4

Antimicrobial
proteins (AMPs)

Answer 4

Have broad-spectrum antimicrobial activities and
attract dendritic cells and mast cells.

Question 5

Natural killer (NK)
cells

Answer 5

Kill infected target cells by releasing granules that
contain perforin and granzymes; phagocytes then
kill released microbes.

Question 6

Phagocytes

Answer 6

Ingest foreign particulate matter.

Question 7

Inflammation

Answer 7

Confines and destroys microbes; initiates tissue
repair.

Question 8

Fever

Answer 8

Intensifies effects of interferons; inhibits growth of
some microbes; speeds up body reactions that aid
repair.