Ch. 20 21 True/False
Cellular ingestion and destruction of particulate matter is called phagocytosis.
T
The respiratory burst produced by some macrophages releases free radicals.
T
The directional movement of cells in response to chemicals is called chemotaxis.
T
Fever is seldom beneficial because it speeds up the cellular metabolic rate and will not allow antigen-antibody reactions to occur.
F
Virus infected cells secrete complement to "warn" other cells of the presence of virus.
F
The classical complement pathway involves antibodies.
T
Substances capable of triggering the adaptive immune system and provoking an immune response are called antigens.
T
Some immunocompetent cells will never be called to service in our lifetime.
T
Adaptive immunity is provided only by lymphocytes that secrete antibodies.
F
Adaptive immunity is provided only by lymphocytes that secrete antibodies.
T
It is our genes, not antigens, that determine what specific foreign substances our immune system will be able to recognize and resist.
T
Soluble proteins secreted by plasma cells are called antibodies.
T
Antibodies cn act both intracellularly and extracellularly.
T
The mechanism of the "lethal hit" of cytotoxic T cells and NK cells involves a protein called perforin.
T
A given pathogen will provoke either a cell-mediated response or an antibody-mediated response but not both.
T
Monoclonal antibodies can be specific for several antigenic determinants.
F
Both T cells and B cells must accomplish double recognition: They must simultaneously recognize self and nonself to be activated.
T
Anaphylactic shock can result from an immediate hypersensitivity where the allergen enters the blood.
T
A transfusion reaction is a subacute hypersensitivity to foreign red blood cells.
T
The thymus functions strictly in maturation of T cells.
T
The lymphatic capillaries function to absorb the excess protein-containing interstitial fluid and return it to the bloodstream.
T
Lymphatic capillaries are permeable to proteins.
T
Digested fats are absorbed from the intestine by the lymph capillaries.
T
Chyle is delivered to the blood via the lymphatic system.
T
About 3 liters of fluid are lost to the tissue spaces every 24 hours and are returned to the bloodstream as lymph.
T
Because lymph vessels are very low-pressure conduits, movements of adjacent tissues are important in propelling lymph through the lymphatics.
T
When tissues are inflamed, lymphatic capillaries develop openings that permit uptake of large particles such as cell debris, pathogens, and cancer cells.
T
The cisterna chyli collects lymph from the lumbar trunks draining the upper limbs and from the intestinal trunk draining the digestive organs.
F
Lymph capillary permeability is due to minivalves and protein filaments.
T
Like blood, lymph flows both to and from the heart.
F
Lymphoid tissue is mainly reticular connective tissue.
T
Lymphocytes reside temporarily in lymphoid tissue, then move to other parts of the body.
T
The simplest lymphoid organs are the lymph nodes.
F
There are more efferent lymphatic vessels leaving a lymph node than there are afferent vessels entering a lymph node.
F
Peyer's patches are clusters of lymphoid tissue found primarily in the large intestine.
F
If even a small part of the spleen is left in a ten-year-old child, it will most likely regenerate itself.
T
The most important role of the spleen is to provide a site for lymphocyte proliferation and immune surveillance and response.
F
In the spleen, red pulp is involved in the immune functions and white pulp is involved in disposing of worn-out RBCs.
F
All the lymphoid organs are well developed before birth.
F