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anatomy/physicology

quiz 11

QuestionAnswer
The presentation of an antigen by an antigen-presenting cell activates the T cell. The cell then divides repeatedly to form a clone of identical sensitized T cells that form effector T cells and memory cells.
Lymphocytes that kill many types of tumor cells and cells infected by different kinds of viruses are known as natural killer cells.
The lymphatic system serves various functions in the body. The two most important functions of this system are fluid balance and immunity.
The movement of phagocytes from blood vessels to an inflammation site is called diapedesis.
What is the function of the spleen? tissue repair hematopoiesis red blood cell and platelet destruction blood reservoir
Molecules formed by the reactions of the complement cascade assemble themselves on the enemy cell’s surface, which results in cytolysis
The primary organ of the lymphatic system is the thymus
The internal environment of the human body is protected by the _____, which is(are) referred to as the first line of defense. skin
The body’s defense mechanisms can be organized into one of two major categories of immune mechanisms; these are innate and adaptive immunity.
The _____ postulates that when an antigen enters the body, it selects the clone whose cells are committed to synthesizing its specific antibody and stimulates these cells to proliferate and to thereby produce more antibodies. clonal selection theory
Recognition of antigens by antibodies occurs when an antigen’s epitopes fit into and bind to an antigen molecule’s antigen-binding site.
Because T cells attack pathogens more directly, T-cell immune mechanisms are classified as _____ immunity. cell-mediated
The functions of the lymph nodes are defense and hematopoiesis.
Masses of lymphoid tissue located in a protective ring under the mucous membranes in the mouth and the back of the throat are called tonsils
Antibodies are proteins of the family called immunoglobulins
During their residence in the thymus, pre-T cells develop into _____, cells that proliferate as rapidly as any in the body. thymocytes
Bean-shaped structures located at certain intervals along the lymphatic system are lymph nodes.
Which of the following is a powerful poison that acts directly on any cell and quickly kills it? lymphotoxin
The ingestion and destruction of microorganisms or other small particles is called phagocytosis.
Which organ has several functions, including defense, hematopoiesis, red blood cell and platelet destruction, and blood reservoir? spleen
Which of these substances operate(s) immune mechanisms? sebum mucus enzymes hydrochloric acid in gastric mucosa
Activities that result in central movement or flow of lymph are called lymphokinetic activities.
Pyrogen molecules trigger the fever response by promoting the production of prostaglandins.
Chemotaxis is the process by which a cell navigates toward the source of the chemotactic factor by way of detecting and then moving toward higher concentrations of the factor.
Adaptive immunity, part of the body’s third line of defense, is orchestrated by two different classes of a type of white blood cell called the lymphocyte
Which antibody is synthesized by immature B cells and then inserted into their plasma membranes? immunoglobulin M
Lymphatics in the villi of the small intestines are called lacteals
Each cortical nodule is composed of packed lymphocytes that surround a less dense area called a germinal center.
_____ refers to a phenomenon in which the genetic characteristics common to a particular kind of organism provide defense against certain pathogens. Species resistance
Which protein interferes with the ability of viruses to cause disease? interfon
Created by: dljsapp
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