new questions on nbde 1

[sharabi23]

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😱

 

[DrTacoElf]

.

 

[wannabepedsdent]

seminiferous tubules make sperm... vas deferens stores them

 

[DrTacoElf]

.

 

[asdf84]

answer is starving.its a right ans guess.in strving protein is spare for activity so not catabolise,
and whenever u eat fat or glucose or protein mean u will make fat and when fat anbolism protein catabolism.
so during starving energy from fat and no glucose or protein used as a enegy.its a perfect basic.i think.

 

[s m i l e 2007]

negative nitrogen balance in deficiency of essential aminoacids(staravtion) postive nitrogen balance - less out put of nitrogen - controlled diet.

its just my guess.

 

[PrePerio]

I think the answer is eating plenty of fats and carbs but no protein...

Starving --> body has used up glucose/glycogen and is running on fat stores and breaking down muscle --> nitrogenous byproducts in urine
On a well balanced diet --> there will be nitrogenous byproducts in urine from metabolizing the dietary proteins
On a diet containing adequate fat and carbohydrates and no protein --> body will get its energy from the ingested fats and carbs --> no protein will be degraded from either the dietary sources of from muscle --> the least nitrogen products in urine
A diet containing adequate protein but little carbs or fats --> lots of protein being digested --> lots of nitrogen in urine

 

[skydentist]

well i agree with Preperio 's answer
1-on a diet with adequate carbohydartes and fats and no proteins .

2-seminiferous tubules store urine .

3-sour .
as dissociation will have an acidis pH.

ques-each of the following is correctly paired with an activated precursor of the polymer EXCEPT one ? which is an exception
1- sucrose -dextran
2-glucose -glycogen
3-sucrose -mutan
4-UDP-glucose glycogen
5-SUcrose -levan.

QUEs -A mouth rinse contains .o5 % Fluoride .which represents concentration expressed as ppm of fluoride ?
1-5
2-50
3-500
4-5000.
i think my ans is 50,000. but its not an option 😕

 

[skydentist]

well i agree with Preperio 's answer
1-on a diet with adequate carbohydartes and fats and no proteins .

2-seminiferous tubules store urine .

3-sour .
as dissociation will have an acidis pH.

ques-each of the following is correctly paired with an activated precursor of the polymer EXCEPT one ? which is an exception
1- sucrose -dextran
2-glucose -glycogen
3-sucrose -mutan
4-UDP-glucose glycogen
5-SUcrose -levan.

QUEs -A mouth rinse contains .o5 % Fluoride .which represents concentration expressed as ppm of fluoride ?
1-5
2-50
3-500
4-5000.
i think my ans is 50,000. but its not an option 😕

 

[sharabi23]

cool

 

[quest_life]

Answer

please see if one can answer the following questions with reasoning. thanks.

4- Dissociation of substante ( 8 x 10-6 ) is
swwet
bitter ( Answer)
sour
salty


1. What structure stores sperm
o Testis, vas defrens, seminiferous tubules
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. a person cannot hear vibrations of a fork..he can hear it if it is placed on its mastoid antrum..this indicates damage of.....?

 

[jonnytight]

Dissociation:
K = dissociation constant.... The more a subtance is likely to dissociate then the higher the K... H3PO4 (phosphoric acid) has K values of greater than 1 for each of its H+.... Water has a Kw value of 10^-14....

For this K, the molecule would not be a ion, but a covlently bonded molecule.

Therefor the answer would not be sour (acid aka ion), salt (ion), bitter (some bitter compounds are ions, like denatonium)... So my answer would be SWEET

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Semiferous tubules is the best answer as explained previously

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A diet containing adaquate carb/lipid but no protein as explained previously

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"Hearing" via bony conduction... the condition is called "conductive hearing loss"
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1.0% = 10,000 ppm... so 0.05% = 500 ppm

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Im a little confused about the last question regarding precursors/products... this is why:

sucrose = glucose + fructose
fructose becomes levans and fructans
glucose becomes glucans (aka mutans) and dextrans so....

sucrose - dextran YES
glucose -glycogen YES
sucrose - mutan YES
UDP-glucose - glycogen YES
Sucrose - levan YES

Some have an explanation? Thanks

 

[skydentist]

Thanks to all for the explanations .can someone plz again the ques

ques-each of the following is correctly paired with an activated precursor of the polymer EXCEPT one ? which is an exception
1- sucrose -dextran
2-glucose -glycogen
3-sucrose -mutan
4-UDP-glucose glycogen
5-SUcrose -levan
eveyone has posted some different ans ...i think its the 3 option.

Plz suggest.

 

[Ice2remember]

ques-each of the following is correctly paired with an activated precursor of the polymer EXCEPT one ? which is an exception
1- sucrose -dextran
2-glucose -glycogen
3-sucrose -mutan
4-UDP-glucose glycogen
5-SUcrose -levan.

the answer is 2.
glycogen synthesis needs glycogen polymer .UDP glucose is and glucose is not.hope this helps

 

[sharabi23]

nice

 

[Ice2remember]

R u saying fructose - levan is right but not sucrose - levan.?
since sucrose = glucose + fructose .i still think sucrose is a precursor for levan and i still believe glucose is not a precursor of glycogen.BTW what do u have in your answer key?

 

[sharabi23]

R u saying fructose - levan is right but not sucrose - levan.?
since sucrose = glucose + fructose .i still think sucrose is a precursor for levan and i still believe glucose is not a precursor of glycogen.BTW what do u have in your answer key?

i think you are correct. can you explain this question please. thanks doc.


If the air temperature is 105o F and the relative humidity is 10 percent, then which of the following represents the primary cause for loss of body heat?

1. Evaporation
2. Conduction
3. Convection
4. Radiation
5. Hyperventilation

 

[dentheartthrob]

IN a histologic section through the epiphyseal plate of the femur of an 18 year old boy, which of the following is the zone in which the cartilage lacunate appear swollen and the chondrocytes are large.

a. proliferation
b. bone deposition
c. reserve cartilage
d. cartilage calcification
e. hypertrophy and maturation

 

[dentheartthrob]

If the air temperature is 105o F and the relative humidity is 10 percent, then which of the following represents the primary cause for loss of body heat?

1. Evaporation
2. Conduction
3. Convection
4. Radiation
5. Hyperventilation

[/QUOTE]


a. evaporation.

 

[asdf84]

i just need to change my answer,positive nitrigen balance,balanced diet,least amont of nitrogen excretion,not guess,its the right answer.

 

[s m i l e 2007]

i think you are correct. can you explain this question please. thanks doc.


If the air temperature is 105o F and the relative humidity is 10 percent, then which of the following represents the primary cause for loss of body heat?

1. Evaporation
2. Conduction
3. Convection
4. Radiation
5. Hyperventilation

if tempt more than room temperature all the other options except evapouration causes flow of heat towards inside where as evapouration causes outflow of temperature.
its a guess correct me if i am wrong

 

[Ice2remember]

need help solving this question?

1)which of the following statements describes an example of innate immunity?

a) an allergic reaction to insect venom
b)a classical pathway of complement.
c)the destruction of virus infected cells by t-killer cells.
d)the production of Ig G in responce to insect venom.
e)the alternate pathway to complement.

these r my thoughts.innate immunity-- non specific-- inflammation --complement is activated--pagocytosis(macrophages,dendritic cells,neutrophils) mast cells, basophils ,Nk cells.
T-cells, B-cells involvement means adaptive immunity.so the answers c and d are not right.
the right choice seems e coz alternate complment pathway is not antibody specific.
correct me if i am wrong.the answer key that i have says c.

 

[dentheartthrob]

need help solving this question?

1)which of the following statements describes an example of innate immunity?

a) an allergic reaction to insect venom
b)a classical pathway of complement.
c)the destruction of virus infected cells by t-killer cells.
d)the production of Ig G in responce to insect venom.
e)the alternate pathway to complement.

these r my thoughts.innate immunity-- non specific-- inflammation --complement is activated--pagocytosis(macrophages,dendritic cells,neutrophils) mast cells, basophils ,Nk cells.
T-cells, B-cells involvement means adaptive immunity.so the answers c and d are not right.
the right choice seems e coz alternate complment pathway is not antibody specific.
correct me if i am wrong.the answer key that i have says c.

t-killer cells are activated non specifically, sincet hey lack CD3 -associated TCR and surface IgM or IgD they do not recognize previous exposure to certain types of antigens.