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Exam 17: Body Defense Mechanisms

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Question 21

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Which of the following can be defined as small proteins that are secreted from virally infected cells to prevent the spread of the infection?

A) macrophages
B) mast cells
C) immunoglobulins
D) interferons

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Question 22

Multiple Choice

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Why are severe burn patients at extreme risk of infection?

A) The skin is the first and primary barrier to preventing ingress of foreign substances.
B) These patients have to stay in a hospital environment for a long time while being exposed to sick people.
C) Most immune system cells are destroyed when the skin is damaged.
D) The skin helps with the production of vitamin E, a necessary disease-fighting vitamin.

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Question 23

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Allergens combine with IgE to cause mast cells to release ________.

________ is the procedure in which a harmless form of an antigen from a pathogen is introduced into the body in order to stimulate an immune response to that antigen.

Which of the following is capable of resetting the thermostat of the body to cause a fever?

A system that consists of a group of 20 proteins whose activities enhance the body's other defense mechanisms is called ________.

Which of the following is not a function of an antibody?

Ivonna, 15, was exposed to the measles virus 13 days ago but doesn't seem to be getting sick. She was sick from the disease when she was 10, so her body has most likely activated this reaction.

Match each definition to the correct term

Each cell in an individual's body carries certain molecules that tell the body they belong to that individual. Those molecules are called ________.

Why is organ transplantation challenging?

A(n) ________ is an overreaction by the immune system to an allergen.

If a disease attacked this type of white blood cell, a person would no longer be able to mobilize his or her specific defenses.

The eye is a warm, moist environment favored by many harmful bacteria. Nevertheless, eye infections are relatively rare. Why is this?

Which antibody has the shape of a pentamer, or five-sided arrangement?

If all of the hairlike structures, called ________, in respiratory passages suddenly stopped working, a person would probably have more respiratory infections.

According to preliminary tests, Alexandra has liver cancer, but the mass is inoperable and hard to localize. In order to administer x-ray beam therapy safely and effectively, the doctors must find the exact location of the cancer. Which of the following methods would be best in this situation?

________ are lymphocytes that originate in the bone marrow but then mature in the thymus.

What are the three strategies for defending against foreign organisms, cells, or molecules?

Any substance that triggers an immune response in the body is called a(n) ________.