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Immune System Practice Questions
Terms in this set (51)
What is a characteristic of antibodies?
Composed of heavy and light polypeptide chains
Small proteins secreted by virus-containing cells.
Major innate mechanism that mediates destruction of foreign substances in the body.
Stimulate the proliferation of other lymphocytes.
Helper T cells
Dampen the activity of both T cells and B cells.
Regulatory T cells
Present the double activation signal to T cells.
Which is associated with passive immunity?
Passage of IgG antibodies from a pregnant mother to her fetus
What is not a type of T cell?
B lymphocytes develop immunocompetence in the _______.
What is not a function of the inflammatory response?
Replaces injured tissues with connective tissue
The redness and heat of an inflamed are due to a local hyperemia caused by _______.
In clonal selection B cells, which substance is responsible for determining which cells will eventually become cloned?
The system that recognizes foreign molecules and acts to immobilize, neutralize, or destroy this is the ________.
The process whereby neutrophils and other white blood cells are attracted to inflammatory site is called ________.
Small molecules that bind with self-proteins to produce antigenic substances are called _________.
The chief antibody-mediated mechanism used agains cellular antigens, such as bacteria, is _________.
The only T cells that can directly attack and kill other cells are the _________.
True or False
Neutrophils may destroy themselves when they phagocytize large quantities of a foreign substance.
True about Phagocytic cells
________ predominates at the sites of chronic infections.
Interfere with viral replication within cells
__________ determine(s) what specific foreign substances our adaptive immune system will be able to recognize and resist.
Regulatory T cells ________.
May function in preventing autoimmune reactions
The only immunoglobin to exist as a pentamer is _______.
What is a characteristic of complete antigens?
Reactivity with an antibody
B cells respond to the initial antigen challenge by ________.
Producing progeny cells that include plasma cells and memory cells
Cancer cells and virus-infected body cells can be killed before activation of adaptive immunity by _______.
Natural killer cells
Compliment proteins and antibodies coat a microorganism and provide binding sites, enabling macrophages and neutrophils to phagocytize the organism. This phenomenon is termed _________.
What is not a characteristic of the adaptive immune system?
It is specific for a given organ
Monoclonal antibodies are used for the diagnosis of all of the following except
What would be classified as a delayed hypersensitivity reaction?
Allergic contact dermatitis
Innate immune system defenses include ________.
Select the correct statement about inflammation.
Exudate is the cause of localized edema.
Phagocyte mobilization involves __________.
Mainly neutrophil and macrophage migration into inflamed areas
Production is regulated by chemicals that reset the body's thermostat to a higher setting
Is the ability of individual cells to recognize a specific antigen by binding to it
Select the correct statement about active and passive immunity.
Active and passive humoral immunity are both mechanisms of specific immunity that use antibodies
Cytoxic T cells _______.
Are the only T cells that can directly attack and kill other cells
Helper T cells ________.
Function in the adaptive immune system activation
Most correct statement about immunodeficiency
The causative agent in acquired immune deficiency syndrome (AIDS) is a virus that recognizes CD4 proteins.
What is true of immediate hypersensitives:
Involve IgE antibodies and the release of histamine from mast cells and basophils
Natural killer (NK) cells _______.
Can kill cancer cells before the immune system is activated
Select the correct statement about antigens.
One antigen may have many different antigenic determinants and may therefore cause the formation of more than one antibody.
Clonal selection if B cells _______.
Results in the formation of plasma cells
The primary immune response ________.
Has a lag period while B cells proliferate and differentiate into plasma cells
Select the correct statement about the function of antibodies.
Compliment fixation is the main mechanism by which antibodies provide protection.
There are over _________ different types of antigen receptors.
Which is not an autoimmune disease?
Type 2 diabetes
Which is not a mechanism for the development of autoimmune disorders?
A second exposure to an allergen
Select the correct statement about compliment.
An adaptive immune mechanism is often involved in directing compliment to its target.
Which is true about the number of binding sites per functional antibody unit?
IgM contains 10 binding sites.
Antibody functions include all of the following except ________.
Cross-linking cell-bound antigens on red blood cells when blood types are properly matched
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