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Exam 24: The Bodys Defenses

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Question 1

Multiple Choice

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Antibodies are ________.

A) composed of four fatty acid chains
B) a type of lymphocyte
C) proteins with short carbohydrates attached
D) proteins consisting of four polypeptide chains

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Question 2

Multiple Choice

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When you cut yourself,the damaged cells immediately release which of the following chemical alarm signals?

A) defensive proteins
B) antibodies
C) histamine
D) antihistamines

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Question 3

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A major function of natural killer cells is to ________.

Which of the following cell types are specifically responsible for the B cell response?

When a B or T cell is primed by an interaction with its particular antigen,the cell ________.

Examine the photograph of the hand in the following figure.The person's joints are severely damaged because ________.

When the immune system improperly turns against the body's own molecules,the result is ________.

A role of the lymphatic system is to ________.

It is best to receive an organ transplant from a donor who ________.

A secondary immune response differs from a primary immune response in that the secondary response ________.

Which statement about antigen recognition in B and T cells is TRUE?

Jonas Salk's polio vaccine trials of 1954 involved giving placebos to 201,229 children and the polio vaccine to 200,745 children.Out of the placebo group,142 children developed polio,whereas 57 children from the vaccine group developed polio.Approximately how many more times likely was a child to develop polio if he or she were NOT vaccinated?

What other observation would suggest that alcohol consumption contributes to increased bacterial and viral infections?

Herd immunity fails when what percentage of the population is NOT vaccinated?

One kind of vaccine consists of a solution containing ________.

A person's spleen may be removed (splenectomy) if it becomes enlarged due to certain types of cancer,traumatic injury,or damage.What part of the immune system will be most affected by a splenectomy?

The figure below shows a Y-shaped antibody molecule.How many antigens can a single antibody molecule bind?

The major result of the inflammatory response is to ________.

Histamine ________.

One function of antibodies is to ________.