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Which of the following is characteristic of antibodies?
they are composed of heavy and light polypeptide chains
Major histocompatibility complex (MHC) antigens (also called human leukocyte associated, or HLA, antigens) are unique to each person's body cells. These self-antigens aid in the detection of foreign invaders. MHC class II antigens are found on
B-lymphocytes and some T-lymphocytes
and antigen-presenting cells
Antibody functions include all of the following except
cross-linking cell-bound antigens on red blood cells when blood cell types are properly matched
Which of the following is true about the number of binding sites per functional antibody unit?
IgM has ten binding sites.
Select the correct statement about complement.
A specific immune mechanism is often involved in directing complement to its target.
. Which of the following is not a mechanism for the development of autoimmune disease?
a second exposure to an allergen
This is the predominant Ig class in body secretions; hence it is called the "secretory antibody.
Which type of antibodies can cross the placenta and confer passive immunity on the fetus/neonate?
Select the correct statement about antigens.
One antigen may have many different antigenic determinants and may thus cause the formation of more than one antibody
The formation of antigen-antibody complexes might trigger the complement cascade at C1. This is called the
The primary immune response
has a lag period while B cells proliferate and differentiate into plasma cells
Select the correct statement about the role of the nervous system in regulating the immune response.
Many immune cells have receptors for neurotransmitters. and The ability of one's state of mind to influence immune function is now accepted as proven by the medical community.
C3b molecules coat a microorganism and roughen its surface, enabling macrophages and neutrophils to phagocytose it. The phenomenon is called
Although we mostly associate eosinophil function with allergic reactions, the cell was originally evolved to deal, most effectively, with
The chief antibody-mediated mechanism used against cellular antigens, such as bacteria, is
Which of the following is not a function of the inflammatory response?
replaces injured tissues with connective tissue
Select the correct statement about phagocytic cells.
Neutrophils may destroy themselves when they phagocytize large quantities of a foreign substance.
. ________ are released by activated T cells and macrophages to mobilize immune cells and attract other leukocytes into the area.
. B cells respond to the initial antigen challenge by
producing progeny cells that include plasma cells and memory cells.
Which of the following is associated with passive immunity?
passage of IgG antibodies from a pregnant mother to her fetus
Select the correct statement about active and passive immunity.
Active and passive humoral immunity are both mechanisms of specific immunity that use antibodies.
Monoclonal antibodies are used for the diagnosis of all of the following except
b. juvenile diabetes.
The system that recognizes foreign molecules and acts to immobilize, neutralize, or destroy them is the
______ determine(s) what specific foreign substances our adaptive immune system be able to recognize and resist.
the type of antigen
The process whereby neutrophils and other white blood cells are attracted to an inflammatory site is called
Toll-like receptors (TLRs) trigger the release of ________ to attract white blood cells to the scene.
Cancer cells and virus-infected body cells can be killed before activation of the immune system by
natural killer cells.
Select the correct statement about the function of antibodies.
Antibodies may directly destroy "invaders".
Select the correct statement about the prevention of immune attack on "self".
Tolerance is developed during fetal life
Which of the following is not characteristic of the adaptive immune system?
It is specific for a given organ.
The B lymphocyte population is capable of producing antibodies against at least 106 different antigens.
Atopy is an inherited tendency to spontaneously develop immediate (type I) allergies to certain environmental antigens.
Fever is seldom beneficial because it speeds up the cellular metabolic rate and will not allow antigen-antibody reactions to occur.
Substances capable of triggering the adaptive immune system and provoking an immune response are called antigens.
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