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Ch 21 Lymphatic System
Terms in this set (48)
T/F: Lymph originates in blood capillaries that pick up tissue fluid.
T/F: Red bone marrow is the point of origin of all immune cells of the lymphatic system.
T/F: Mucous membranes prevent most pathogens from entering the body because of the stickiness of the mucus and the presence of lysozymes.
T/F: Interferon's are secreted in response to bacterial infections.
T/F: Pus is made of dead neutrophils, macrophages, and other tissue debris from a damaged tissue.
T/F: Interleukins are chemical signals by which immune cells communicate with each other.
T/F: Helper T cells respond only to epitopes attached to MHC proteins.
T/F: Cytotoxic T cells respond only to antigens bound to MHC-I proteins.
T/F: Clonal selection of T cells happens in the thymus.
T/F: Humoral immunity takes care of intracellular viruses, whereas cellular immunity takes care of extracellular viruses.
T/F: Memory B cells are found circulating mainly in the lymph.
T/F: Some antibodies against foreign antigens can react to similar self-antigens causing an autoimmune disease.
Lymphatic vessels recover about ______________ of the fluid filtered by capillaries.
Lymph is similar to blood plasma, but very low in
The_____ tonsils are th largest, and their surgical removal(tonsilectomy)
All these forces help lymph to flow except
the lymphatic node pump.
_____________ are the largest of the lymphatic vessels and they empty into the _______________.
Collecting ducts; subclavian veins
Immune surveillance is a process in which ____________ nonspecifically detect and destroy foreign cells and diseased host cells.
natural killer (NK) cells
This organ shows a remarkable degree of degeneration (involution) with age.
This is the only lymphatic organ with afferent lymphatic vessels.
Removal of the______________will be the most harmful if all for a one year old child
All these belong to the second line of defense except
the gastric juices.
______________ are found especially in the mucous membrane, standing guard against parasites and allergens.
___________ employ a "respiratory burst" to produce bactericidal chemicals such as hydrogen peroxide (H2O2) and hypochlorite (HClO).
________________ are secreted by cells infected with viruses, alerting neighboring cells and protecting them from becoming infected.
This figure shows
the action of a natural killer cell.
A pyrogen is a substance that causes
This is the first of a series of neutrophil behaviors in inflammation.
_______________ is not a cardinal sign characteristic of inflammation.
Basophils of the blood help to get defensive leukocytes to the site quickly by releasing an anticoagulant called _____ and a vasodilator called ____________.
All these cellular agents participate in inflammation except
cytotoxic T cells.
These are a group of proteolytic enzymes secreted by natural killer (NK) cells.
_________________ are antimicrobial proteins.
One characteristic of the immune response is specificity. This means that
immunity is directed against a particular pathogen.
artificial active immunity.
Cellular (cell-mediated) immunity is effective against
A(n) ______________ is the region of the molecule that is recognized by antibodies.
T cells undergo positive selection in the thymus, which means
they multiply and form clones of identical T cells.
The serum used for emergency treatment of snakebites stimulates
artificial passive immunity.
The majority of T cells of the naive lymphocyte pool wait for the encounter with foreign antigens in
the lymphatic tissues.
All of the following can act as antigen-presenting cells except
Helper T (TH) cells recognize antigens when they are bound to a(n)
major histocompatibility complex (MHC) protein.
Antigen-presenting cells usually display processed antigens to T cells in
______ participate in both nonspecific and resistance and immune resopnse
Helper T (TH) cells
Cytotoxic T (TC) cells are like natural killer (NK) cells because they both
secrete granzymes and perforin.
Memory T cells can live up to
Antibodies do not
differentiate into memory antibodies, which upon reexposure to the same pathogen would mount a quicker attack.
Before B cells secrete antibodies they differentiate into
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