questions

[drkooks]

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each of following about lymphocyte activation correct except:

IL5 is a B cell growth and differentiation factor
IL2 stimulate proliferation of T and B cells
B cells recognize Ag on surface of Ag presenting cells in context of HLA-D
T cells recognize Ag on surface of Ag presenting cells in context of HLA-B



types of inflammatory exudates exept:
fibrous
fibrinous
pseudomembranous


wich is a nucleotide:
urate
uracil
adenosine
thymidylate

 

[bigstix808]

each of following about lymphocyte activation correct except:

IL5 is a B cell growth and differentiation factor
IL2 stimulate proliferation of T and B cells
B cells recognize Ag on surface of Ag presenting cells in context of HLA-D
T cells recognize Ag on surface of Ag presenting cells in context of HLA-B



types of inflammatory exudates exept:
fibrous
fibrinous
pseudomembranous


wich is a nucleotide:
urate
uracil
adenosine
thymidylate

not a big imuno fan...so #1 is out

#2 - fibrous (i can think of clinical examples of the other two, so by POE i'm guessing its fibrous)

#3 - thymidylate; (urate is the anion of uric acid, adenosine does not contain a phosphate group which is by defenition part of a nucleotide, and uracil is only one of the nitrogen bases found in RNA)

 

[drkooks]

any other ideas...

 

[drkooks]

.which of the following statements BEST describe GTP-binding
proteins(G-Proteins)?
a.are important components of steroid harmone signal transduction
b.catalize the reaction which produces diacylglycerol
c.are tightly bound to adenylate cyclase
d.usually inactive protein kinase C
e.are membrane proteins

Total urinary nitrogen excretion in LEAST when an individual is?
a.starving
b.on a well balanced diet
c.on a diet containing adequate fat and carbohydrate but no protein
d.on a diet containing adequate pretein but no fat or carbohydrate.

 

[skabbaraju]

.which of the following statements BEST describe GTP-binding.
.proteins(G-Proteins)?.
.a.are important components of steroid harmone signal transduction.
.b.catalize the reaction which produces diacylglycerol.
.c.are tightly bound to adenylate cyclase.
.d.usually inactive protein kinase C.
.e...are membrane proteins.

.Total urinary nitrogen excretion in LEAST when an individual is?.
.a.starving.
.b.on a well balanced diet.
.c.on ..a diet containing adequate fat and carbohydrate but no protein.
.d.on a diet containing adequate pretein but no fat or carbohydrate.

1. IL-5 is for eosinophil growth and Il-4 is for B-cell proliferation.
2. G-Proteins - option a sounds perfect to me though there are G-protein receptors that are membrane proteins. (clarify).
3. Starving

 

[bigstix808]

.which of the following statements BEST describe GTP-binding.
.proteins(G-Proteins)?.
.a.are important components of steroid harmone signal transduction.
.b.catalize the reaction which produces diacylglycerol.
.c.are tightly bound to adenylate cyclase.
.d.usually inactive protein kinase C.
.e...are membrane proteins.

.Total urinary nitrogen excretion in LEAST when an individual is?.
.a.starving.
.b.on a well balanced diet.
.c.on ..a diet containing adequate fat and carbohydrate but no protein.
.d.on a diet containing adequate pretein but no fat or carbohydrate.

1) E; steroid hormones don't use signal transduction via membrane proteins, diacylglycerol production is catalyzed via PIP2 hydrolyzing ATP, g-proteins activate adenylate cyclase but are not bound to it, and protein kinases are usually inactivated by hydrolysis of ATP

2)instinct tells me C, but i have read literature that mentions N excretion levels going down with increased levels of dietary protein. sorry cant help more.

 

[toothfairy21]

each of following about lymphocyte activation correct except:

IL5 is a B cell growth and differentiation factor
IL2 stimulate proliferation of T and B cells
B cells recognize Ag on surface of Ag presenting cells in context of HLA-D
T cells recognize Ag on surface of Ag presenting cells in context of HLA-B

ans : B cell recognize Ag on surface of ag presenting cells in context of HLA-D
A critical difference between B cells and T cells is how each lymphocyte "sees" its antigen. B cells recognize their cognate antigen in its native form. They recognize free (soluble) antigen in the blood or lymph using their BCR or membrane bound-immunoglobulin. In contrast, T cells recognize their cognate antigen in a processed form, as a peptide fragment presented by an antigen presenting cell's MHC molecule to the T cell receptor.