Official NBDE Part 1 Study Q & A Thread
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Hatico good work!! you almost got it right except this one:
All of the following can leaad to kidney stone except one
A) Hypercalcemia
B) diabates insipidus-very common.
C) UTI-answer. Kidney stones leads to UTI but UTI doesnt lead to kidney stone formation.
D) .......
IN Addision disease, the hyperpigmentation is caused by cells found in which layer of the skin
A) S. granular
B) S. Cornem
C) S. germinale?basale-answer
D) S. lucidum
E) S. Spinosum
All of the following can leaad to kidney stone except one
A) Hypercalcemia
B) diabates insipidus-very common.
C) UTI-answer. Kidney stones leads to UTI but UTI doesnt lead to kidney stone formation.
D) .......
IN Addision disease, the hyperpigmentation is caused by cells found in which layer of the skin
A) S. granular
B) S. Cornem
C) S. germinale?basale-answer
D) S. lucidum
E) S. Spinosum
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Based on what I know,
Preameloblast --> ameloblast if odontoblastic process pokes it ' - ' ;;
Ameloblast secretes enamel at DEJ from its Tome's process.
I don't know how Tome's process looks like but I just think of it a small hole on ameloblast that enamel comes out 🙂
I think keratinocytes are also in S. basale.
Did you already start studying for the retake even before finding out the result? (if you ask me, yes I just started already 😀)
I have answered some, Holly correct some of them. I agree with correction.
Which of the following BEST characterizes the alveolar mucous membrane?
- Has no melanocytes
- Firmly bound to underlying bone
- Well developed epithelial ridges
- Separated from the gingiva by the free gingival groove
- Appears red due to high vascularity and thinness of epithelium ans
Fracture of the hamulus affects the action of which of the following muscles?
- Superior constrictor of the pharynx
- Levator veli palatini
- Tensor veli palatini ans
- Salpingopharyngeus
- Buccinator
Why only Tensor veli palatini? How about salpingopharyngeus and muscles of pterygo-mandibular raphe - Buccinator and Superior constrictor?🙄
I am thinking about the same thing.
Dental deck said
Type One collagen = bONE
But then when I went to google and typed type 1 collagen, it seems it exists in places other than bone too such as tendons.
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Respiratory centre is activated when there is low O2 levels/high Co2 levels(low pH) in blood. Now when again O2 levels come back to normal,pH goes back up i.e., increase in pH-respiratory centre slows down since there is enough o2 already.
The next Q....terminal web thing...weird😕...I just left it! No torturing my brain!
I believe that another word for respiratory center is chemoreceptor.
There is central and peripheral chemoreceptors.
They detect increase in CO2 more than anything else (decreased O2, and pH).
If CO2 increase in our body, then it's bad~ so we need to hyperventilate.
If CO2 decrease in our body, then there is no need to ventilate to release it.
Increased pH means decreased H meaning that CO2 in our body decreased (cuz CO2 + H2O --> H2CO2 --> H + HCO3 so H is directly related to CO2)
Anyways, since CO2 is decreased, no need to ventilate = decreased respiratory activity.
isn't respiratory center same as central chemoreceptor?
I think central chemoreceptor is in medulla wheras peripheral chemoreceptor is at carotid body.
The only way central chemoreceptors can acknowledge any change is through the amount of excess H+ directly, a by product of the breakdown of Carbonic acid. It is NOT through CO2 directly, as is stated in some books.
Which of the following represents the pH of a solution that has a 10-3 M concentration of OH- ion?
I think correct answer is 11...
- 5
- 7
- 9 ans
- Determinable only if the pka is known.
- Determinable only if the base composition is known.
I think correct answer is 11...
Which of the following represents the pH of a solution that has a 10-3 M concentration of OH- ion?
What does M mean?
- 5
- 7
- 9 ans
- Determinable only if the pka is known.
- Determinable only if the base composition is known.
I think correct answer is 11...
M means concentration(molarity).
And I am sure whoever wrote this made a typo, it must've been 10^-5.
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1)Triglyceride absorbed into the lymphatic system is transported to the liver as which of the following?
Sorry for stupid question - it's overstudying
2)Blocking the hypothalamic-hypophyseal venous portal system increases the secretion of which of the following?
3)Pieces of dog parotid gland and pancreas are transplanted under the skin of the donor animal. After re-establishment of circulation, ingestion of food will result in secretion from which of the following?
4) How many anomeric carbons in glucose and fructose? 1 - C1. Correct?
- Very low density lipoprotein
- Low density lipoprotein
- Chylomicrons ans
- Liposomes
- Micelles
Sorry for stupid question - it's overstudying
2)Blocking the hypothalamic-hypophyseal venous portal system increases the secretion of which of the following?
- Prolactin ans
- Oxytocin
- ACTH
- TSH
3)Pieces of dog parotid gland and pancreas are transplanted under the skin of the donor animal. After re-establishment of circulation, ingestion of food will result in secretion from which of the following?
- Parotid and pancreatic transplants
- The fragment of the pancreas only ans
- The fragment of the parotid only
- Neither fragment
4) How many anomeric carbons in glucose and fructose? 1 - C1. Correct?
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which of the following is NOT true about ammonia and alpha-amino group of amino acids?
-NH4 s formed from glutamine in kidney
-amino group in carbamyl phosphate s directly donated by aspartate n transamination reactions (ans)
-cellular levels of ammonia must be maintained at low conc because of its toxcity
-glutamate dehydrogenase can catalyse the formation of glutamate from ammonia and alpha-ketoglurate using NADPH as cofactor
according to me the last option has to be correct..as glutamate dehydro leads to formation of glutamate from alpha-keto BUT it 'releases' ammonia
plz correct me if iam wrong?
-NH4 s formed from glutamine in kidney
-amino group in carbamyl phosphate s directly donated by aspartate n transamination reactions (ans)
-cellular levels of ammonia must be maintained at low conc because of its toxcity
-glutamate dehydrogenase can catalyse the formation of glutamate from ammonia and alpha-ketoglurate using NADPH as cofactor
according to me the last option has to be correct..as glutamate dehydro leads to formation of glutamate from alpha-keto BUT it 'releases' ammonia
plz correct me if iam wrong?
Which of the following represents the pH of a solution that has a 10-3 M concentration of OH- ion?
What does M mean?
- 5
- 7
- 9 ans
- Determinable only if the pka is known.
- Determinable only if the base composition is known.
I think correct answer is 11...
no 9 is right..
the formula:-
Kw = [H+] [OH-]
(at 25C Kw is 10(-14)
10(-14) = [H+] 10(-3)
[H+] = 10(-9)
ph =-log (H+)
hence pH= 9
hope i was clear...🙂
Ah the answer is right. Jeez we need to pay attention to little details!-It says ->amino group in carbamyl phosphate s directly donated by aspartate n transamination reactions. False!
Explaination:"Aspartate donates its amino group, becoming the a-keto acid oxaloacetate. Alpha-Ketoglutarate accepts the amino group, becoming the amino acid glutamate"
For the last-yes ammonia is formed!
so u saying amino group comes from glutamate (not aspartate - it only donates it)...
-It says ->amino group in carbamyl phosphate s directly donated by aspartate n transamination reactions. False!
Explaination:"Aspartate donates its amino group, becoming the a-keto acid oxaloacetate. Alpha-Ketoglutarate accepts the amino group, becoming the amino acid glutamate"
For the last-yes ammonia is formed!
if u agree with both options then both has to right, right?
which of the following does NOT occur when anaesthetics are applied to neural membrane?
-K+ flux remains unchanged
-Ca++ flux through the membrane
-resting potential drops to a more negative value (ans)
y cant it be second option ? as K+, Cl- n Ca++ conductances remain unchanged
and more positive means Action potential so here the resting potential is more negative hence no action potential during anaesthetics...plz correct me if iam wrong....
-K+ flux remains unchanged
-Ca++ flux through the membrane
-resting potential drops to a more negative value (ans)
y cant it be second option ? as K+, Cl- n Ca++ conductances remain unchanged
and more positive means Action potential so here the resting potential is more negative hence no action potential during anaesthetics...plz correct me if iam wrong....
1)Triglyceride absorbed into the lymphatic system is transported to the liver as which of the following?
If answer is 3 that Q is wrong! Chylomicrons are never transported to the liver - only to extrahepatic tissues.
If Q is correct that answer is wrong. Only LDL and HDL carry tryglicerids (and cholesterol) to the liver
- Very low density lipoprotein
- Low density lipoprotein
- Chylomicrons ans
- Liposomes
- Micelles
If answer is 3 that Q is wrong! Chylomicrons are never transported to the liver - only to extrahepatic tissues.
If Q is correct that answer is wrong. Only LDL and HDL carry tryglicerids (and cholesterol) to the liver
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During the period of isovolumetric contraction, which of the following happens?
- The semilunar valves are open.
- The left ventricular pressure is rising rapidly.ans
- The aortic pressure is slightly less than the left ventricular pressure.
- The right ventricular pressure is greater than the left ventricular pressure.
