A given pathogen will provoke either a cell-mediated response or an antibody-mediated response but not both.
Fever is seldom beneficial because it speeds up the cellular metabolic rate and will not allow antigen-antibody reactions to occur.
Both T cells and B cells must accomplish double recognition: They must simultaneously recognize self and nonself to be activated.
Anaphylactic shock can result from an immediate hypersensitivity where the allergen enters the blood.
It is our genes, not antigens, that determine what specific foreign substances our immune system will be able to recognize and resist.
Which of the following is characteristic of antibodies?
composed of heavy and light polypeptide chains
Which of the following is associated with passive immunity?
passage of IgG antibodies from a pregnant mother to her fetus
Which of the following is not a function of the inflammatory response?
replaces injured tissues with connective tissue
In clonal selection of B cells, which substance is responsible for determining which cells will eventually become cloned?
Which of the following statements regarding NK cells is a false or incorrect statement?
NK cells are a type of neutrophil.
The process whereby neutrophils and other white blood cells are attracted to an inflammatory site is called?
Which of the following is the correct sequence of events is phagocytosis?
Chemotaxis, adherence, ingestion, digestion, killing
The type of antigen
determines what specific foreign substances our adaptive immune system will be able to recognize and resist.
are released by activated T cells and macrophages to mobilize immune cells attract other leukocytes into the area.
Cancer cells and virus-infected body cells can be killed before activation of adaptive immunity by
natural killer cells
Complement proteins and antibodies coat a microorganism and provide binding sites, enabling macrophages and neutrophils to phagocytize the organism. This phenomenon is termed
Which of the following is not characteristic of the adaptive immune system?
It is specific for a given organ.
Which of the following would be classified as a delayed hypersensitivity reaction?
allergic contact dermatitis
is the ability of individual cells to recognize a specific antigen by binding to it
Select the correct statement about the prevention of immune attack on "self"
Tolerance is developed during fetal life.
Select the correct statement about active and passive immunity.
Active and passive humoral immunity are both mechanisms of adaptive immunity that use antibodies.
Select the correct statement about immunodeficiency.
The causative agent in acquired immune deficiency syndrome (AIDS) is a virus that recognizes CD4 proteins.
Which of the following is true of immediate hypersensitivities?
They involve IgE antibodies and the release of histamine from mast cells and basophils.
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.
Which of the following is not a mechanism for the development of autoimmune disorders?
a second exposure to an allergen.
Select the correct statement about complement.
An adaptive immune mechanism is often involved in directing complement to its target.
Which of the following is true about the number of binding sites per functional antibody unit?
IgM contains 10 binding sites.
Toll-like receptors (TLR) trigger the release of
CYTOKINES to attract white blood cells to the scene.
What is the role of interferon in defense against disease?
protects cells that have not yet been infected by viruses.
cells can lyse and kill cancer cells and virus-infected body cells before he immune system is activated.
is a dangerous condition where the cytokines are released unchecked, making the capillaries very leaky and thus depleting blood fluids.
refers to a group of at least 20 plasma proteins that normally circulate in an inactive state and are a major mechanism for destroying foreign substances in the body.
The antibody that becomes bound to mast cells and basophils and causes the cells to release histamine and other chemicals is