The lymphatic system includes areas of high concentrations of APCs, T and B cells. has a pumping mechanism to move fluid. is very impermeable to extracellular fluid. collects fluid from around the brain and spinal cord. is the site of B and T cell clonal deletion
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includes areas of high concentrations of APCs, T and B cells. |
has a pumping mechanism to move fluid. |
is very impermeable to extracellular fluid. |
collects fluid from around the brain and spinal cord. |
is the site of B and T cell clonal deletion. |
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- Choose 1 or more than 1 CD8 T lymphocytes: are generated from lymphoid progenitors in secondary lymphoid organs. help B lymphocytes to differentiate into plasma cells. recognize antigens through specific cell surface receptors. can be helped by CD4+ T lymphocytes to differentiate into cytotoxic T lymphocytes. are involved in the defense against intracellular pathogens.One purpose of the lymphatic system is to: Group of answer choices transport nutrients and oxygen. return interstitial fluid to the blood. block the transport of blood proteins. produce red blood cells. deliver carbon dioxide to the heart.All of the following are true of the lymphatic system, EXCEPT: which option below is the answer? None of the other four answers (all are true of the lymphatic system) It brings microbial antigens into contact with immunologically active cells (lymphocytes and macrophages) Lymphatic capillaries lie in close physical proximity to arterial and venous capillaries Lymph nodes are located at lymphatic vessel junctions Its only important function is to carry interstitial fluid back to the circulatory system
- Clonal expansion of B cells: results in the production of memory cells only. leads to the production of plasma cells only. results in cells that secrete antibodies constantly for the entire life of a person. describes the process of multiplication of a B cell that has recognized an antigen.What is the correct function of the lymphatic capillaries? production of pre-B and pre-T cells maturation of T cells removes excess fluids from tissues absorption of fats from the small intestine filters blood and is the site of lymphocyte activation filters lymph and is the site of lymphocyte activationLymphatic capillaries: originate as pockets (blind ends) in tissues both are made of loosely joined endothelial cells forming easily opened mini-valves and originate as pockets (blind ends) in tissues are made of loosely joined endothelial cells forming easily opened mini-valves, originate as pockets (blind ends) in tissues, and collapse easily collapse easily are made of loosely joined endothelial cells forming easily opened mini-valves
- Major histocompatibility proteins (MHC) presented with an antigen: are recognized by T lymphocytes both may be expressed by any nucleated cell and are recognized by T lymphocytes both may be expressed by any nucleated cell and are recognized by B lymphocytes may be expressed by any nucleated cell are recognized by B lymphocytesMatch the formed elements with their functions: Erythrocytes thrombocytes granulocytes neutrophils basophil natural killer cells Choices nonspecific innate defense mechanisms carry oxygen to tissues seek out and destroy bacteria via phagocytosis recognize and destroy abnormal host cells basophil releases histimine; function in allergic reactions and inflammation responses formation of blood clots and tissue repairWhich of the following shows the correct order of events in the life of a lymphocyte Activation, Effector response, formation Formation, Activation, Effector response Effector response, Formation, Activation Formation, Effector Response, Activation
- Compare and contrast in detail the production, maturation, and activation of B and T cells.The inflammatory response leads to increased activity of all of the following EXCEPT: Group of answer choices vascular permeability numbers of phagocytes T cells blood flow due to vasodilationDefine T Cells and their role in organ transplantation.