The Immune System Answers

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Which are correct examples of physical (P), chemical (C), and biological (B) barriers?

P: complement system; C: saliva; B: coughing

P: coughing; C: saliva; B: complement system

P: coughing; C: sneezing; B: complement system

P: complement system; C: saliva; B: sneezing

Lupus, a condition in which the body attacks its own cells, is an example of

an allergic disorder.

an immunodeficiency disorder.

a cancer of the immune system.

an autoimmune disorder.

What do saliva, tears, and nasal mucus have in common?

All can be classified as biological barriers.

All contain Langerhans cells.

All can destroy bacterial cell walls.

All are part of the complement system.

A person who has allergies has a compromised immune system because the body’s immune system

attacks its healthy cells.

overreacts to an antigen.

steals nutrients from healthy cells.

responds to mutagens.

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