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Microbio Exam---4

Exam 4

QuestionAnswer
T cells are so named because they mature in the thyroid FALSE ---thymus!!
Which of the following shows increased effectiveness on repeated exposure to antigen specific immune system
Hematopoesis refers to development of white blood cells in bone marrow
white blood cells are involved in both specific and nonspecific immunity True
t-cell receptors recognized antigens presented on the surface of dendritic cells true
physical barrier in the nonspecific defense of a mammalian host? mucous membrane
which of teh following mature into macrophages or dendritic cells? monocytes
the immune system noramlly discriminates between ____antigens self and nonself
t-cells produce and secrete factors which do not directly interact with invading microorganisms but which enhance the bodys defense mechanisms. these molecules are called.. cytokines
antibodies can bind to an antigen and are part of teh nonspecific immune response
a mature activated B cell can become a plasma cell
substances that are recognized as foerign and provoke immune responses are called anitgens
which of the following is a characteristic associated w/ secondary antibody responses? shorter lag phase, higher antibody titer, and higher antibody affinity
which type of immune cells kill malignant cells and cells infected with pathogens by releasing perforain and granzyme natural killer cells
which type of lymph tissure is spleen considered secondary
cytotoxic tymphocytes are distinguished from other lymphocytes by the presence of CD8
the response of the immune system the first time an invader is encountered is in innate response
when an individual acquires antibodies from mothers milk it is considered naturally acquired passive immunity
acquired immunity refers to thetype of specific immunity that develops after exposure to a specific pathogen, involves teh participation of lymphocytes, involves a memory aspect
the inability of a virus to bind to its target cell as a result of antibody binding to the virus is viral neutralization
mechanisma for recognition of microbe by phagocyte can be opsin dependent or independent
neutrophils may exocytise microbial fragments resulting in extracellular release of microbial fragments true
variable domain of antibody molecules binds target antigen
which is NOT true of the constant domain of antibody molecules binds target antigen
antigen presenting cells display foreign fragments on their surfaces next to MHC
which of the following is NOT one of the 4 cardinal signs of inflammation clotting
whcih allows neutrophils to change shape and squeeze through endothelial wall diapedesis
chronic inflammation can lead to formation of a granuloma
in MALT, the m stands for _____and the L stands for _____ mucosal lymphoid
which is NOT part of non-specific immune system in intestine? SALT----pancreatic enzymes , intestinal enzymes, GALT, peristalsis
the humoral immune response differs from the cell mediated immune respnse in that only in the humoral immune response is there secretion of antibody
humoral immune response defends against bacteris venom viruses
which is NOT a type of granulocyte Dendrophyl
Basic mechanism for T-dependent antigen triggering of a B cell involes what cells? APC, T-helper cell and B cell
these cells recognize abnormal host cells that lack MHC class 1 surfacemolecule and kill the target cell by causing it to lyse NK cells
In primary immune response, which is 1st immunoglobin isotype produced? IgM
in secondary immune respnse , which is most plentiful immunoglobin isotype protein IgG
both dendritic cells and macrophage arise from cytoxic T-lymphocytes
Class 1 MHC molecules found on almost all types of nucleated cells true
1 of the functions of the complement system is endocytosis
the minimum inhibitory concentration (MIC) is the lowest concentration of drug from which organisms fail to recover when removed from the drug to have a selective toxicity true
one way that the development of drug resistance in viruses has been reduced has been by the use of a cocktail of several drugs at high doses true
Created by: ariffell1014
 

 



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