Chapter 26. 26·11–26·13 Malfunction of the immune system causes disease.

Show What You Know - Self Quiz

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You must read each slide, and complete any questions on the slide, in sequence.

Instructions

Check your understanding of concepts from 26·11–26·13 Malfunction of the immune system causes disease by answering the following questions.

1.

1. In what medical disorder do cytotoxic T cells attack and destroy a person's insulin-producing cells?

type 1 diabetes

multiple sclerosis

rheumatoid arthritis

allergic inflammation

hypothyroidism (underactive thyroid)

Correct. (See section 26·11 Autoimmune diseases occur when the body turns against its own tissues.)

Incorrect. (See section 26·11 Autoimmune diseases occur when the body turns against its own tissues.)

2.

2. Autoimmunity is:

the production of antigens on the surface of a person's cells that come to be properly recognized by the immune system as "self" antigens.

the process by which a particular person's body becomes immune to further infection by a specific pathogen.

the progressive resistance to becoming enthralled by the latest model of an automobile.

the destruction of invading pathogens using self-made antibodies vs. antibodies acquired from outside the body.

None of the above is a definition of autoimmunity.

Correct. (See section 26·11 Autoimmune diseases occur when the body turns against its own tissues.)

Incorrect. (See section 26·11 Autoimmune diseases occur when the body turns against its own tissues.)

3.

3. Which medical condition could be diagnosed by injecting small amounts of substances under the skin?

thrush

influenza

AIDS

the common cold

hay fever

Correct. (See section 26·13 Allergies are an inappropriate immune response to a harmless substance.)

Incorrect. (See section 26·13 Allergies are an inappropriate immune response to a harmless substance.)

4.

4. In an allergic response, what happens just after allergens bind to sensitized mast cells?

Mast cells divide by clonal selection, stimulating the cell-mediated immune response.

Cytotoxic T cells neutralize the allergens.

Allergens are imported by mast cells and destroyed.

Antibodies bind to the mast cells and cause them to clump together.

Mast cells release histamine.

Correct. (See section 26·13 Allergies are an inappropriate immune response to a harmless substance.)

Incorrect. (See section 26·13 Allergies are an inappropriate immune response to a harmless substance.)

5.

5. Which of the following behaviors is most likely to transmit HIV?

contact with infected blood or semen

hugging an infected person

kissing an infected person

contact with clothing or linen used by an infected person

All of the above modes of HIV transmission are equally effective.

Correct. (See section 26·12 AIDS is an immune deficiency disease.)

Incorrect. (See section 26·12 AIDS is an immune deficiency disease.)

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