Official NBDE Part 1 Study Q & A Thread
Started by tinman831
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Transmission of impulses from the motor nerve to the muscle cell regularly produces
a) an action potential in muscle
b) a graded potential in muscle cell
c) hyperpolarisation of muscle cell
d)hypopolarisation of muscle cell
e) alteration in threshold potential of muscle cell
Plz explain
It can't be glucose because glucose is transported by GLUT 4 into muscle. It can't be Oxygen because it is transported via simple diffusion. So it's either b or c. But the best example of primary active transport is the Na/K pump in action potential where Na enters the cell and K exits the cell (not enter as in answer b). So the correct answer is (c) Na into endothelial cell.
Please correct me if I am wrong. My exam is in 9 days!
I think its potassium going into the nerve cell.coz Na -k ATP ase pump transport k ion from extracellular fluid into intercellular fluid and transport Na ion from intracellular to extracellular fluid. perfect example of primary active transport.
other examples are ca ion pump and proton pump in gastric parietal cell
Originally Posted by efficient
Pure rotation of the mandible involves which two planes of movement?
Frontal
Horizontal
Saggital
The correct answer per Decks is Frontal and Sagittal.
Can somebody explain the answer including why horizontal is not right?
Thanks
what they mean here is that there are 3 shapes of movement diagram(poessel envelop of motion)and the rotation of the mandible is expressed only in the frontal and the saggital plane ,if you have any other opinion let me know😱
Pure rotation of the mandible involves which two planes of movement?
Frontal
Horizontal
Saggital
The correct answer per Decks is Frontal and Sagittal.
Can somebody explain the answer including why horizontal is not right?
Thanks
what they mean here is that there are 3 shapes of movement diagram(poessel envelop of motion)and the rotation of the mandible is expressed only in the frontal and the saggital plane ,if you have any other opinion let me know😱
i will give you the answer and the clue .there are types of nephrons as you know 1-cortical nephrons (short loop of henly) 2-juxtramudullary nephrons (long loop of henly) and the function of the 2nd one is the concentration of urine due to its long loop so the answer is the length of the loop
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Q - Each of the following is attributable to hepatic failure except one. Which one is this exception ?
A-tremor
B-gynaecomastia
C-mallory bodies
D-hypoalbuminaemia
E-spider telangectasia
Answer is mallory bodies
Can anyone plz explain?
A-tremor
B-gynaecomastia
C-mallory bodies
D-hypoalbuminaemia
E-spider telangectasia
Answer is mallory bodies
Can anyone plz explain?
i think all the above conditions are involved with liver failure in general but mallory bodies is for alcoholic liver disease only..its not clear for me too...lets see what others have to say??
I just did the NDB step 1 and this was not my first attempt. Last time, which was last year, raw score was 233 (out of 400), which gave me 74. I honestly don't think I will answer much more than 233. Does anybody knows if this "scale" has changed since April 2010 last year? I mean for 13 months, are students making better where you need to answer for example 250 questions right to get the passing score of 75?
Last time I received the score report in about 13 days or so.. I hope this has not changed this year
Thank you guys
Last time I received the score report in about 13 days or so.. I hope this has not changed this year
Thank you guys
Hi anyone appearing for Part 1 in dec?
Anyone in Louisiana preparing for Part 1?pl respond.im confused.
Mallory bodies are present in-
Alcoholic hepatitis
Alcoholic liver disease caused by alcoholic hepatitis
Wilsons desease
Hepatocellular carcinoma
Primary biliary cirrhosis
These conditions may/will lead to hepatic failure (showing mallory bodies) but liver failure by itself doesnt have mallory bodies.
In right lateral excursion max right first molar mesiofacial cusp passes through which of following grooves of mandibular first molar..
marked answer .. lingual groove.. my answer mesiofacial groove..
Which of following represents depth of curvature on tooth #13
> than mesial surface of # 6
< than mesial surface of tooth # 11
same as on msial surface of #6
same as on mesial surface of # 11
> mesial surface of tooth #5
Which of the following morphologic variations would worsen the prognosis for existing periodontal disease?
Fused roots
excessively long roots
shoveling trait in incisors
amelogenesis imperfecta
Each of the following molecules is paired with its precursors except one
1 Sucrose-Dextran
2 Glucose-glycogen
3 Sucrose-mutan
4 UDP glucose-glycogen
Sucrose-levan... i think this one is it.. but marked correct answer is choice 2
marked answer .. lingual groove.. my answer mesiofacial groove..
Which of following represents depth of curvature on tooth #13
> than mesial surface of # 6
< than mesial surface of tooth # 11
same as on msial surface of #6
same as on mesial surface of # 11
> mesial surface of tooth #5
Which of the following morphologic variations would worsen the prognosis for existing periodontal disease?
Fused roots
excessively long roots
shoveling trait in incisors
amelogenesis imperfecta
Each of the following molecules is paired with its precursors except one
1 Sucrose-Dextran
2 Glucose-glycogen
3 Sucrose-mutan
4 UDP glucose-glycogen
Sucrose-levan... i think this one is it.. but marked correct answer is choice 2
Last edited:
Which of following represents depth of curvature on tooth #13???????????? i cant get the question can you explain more if you mean the curvatur of cej proximally so no#2 will be the choice
Fused roots worsen the prognosis for existing periodontal disease
Last edited:
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Which of the following explains why digestive action of salivary amylase continues for sometime after swallowing??
1. Gastric HCl increases the action of Amylase (Lippincott says Gastric HCl inhibits action of salivary amylase)
2. Gastric mucus lubricates the bolus and assists the amylase activity
3. Water absorption concentrates the amylase and makes its action more effective
4. Contractions of stomach distribute the amylase more evenlythrough out the bolus
1. Gastric HCl increases the action of Amylase (Lippincott says Gastric HCl inhibits action of salivary amylase)
2. Gastric mucus lubricates the bolus and assists the amylase activity
3. Water absorption concentrates the amylase and makes its action more effective
4. Contractions of stomach distribute the amylase more evenlythrough out the bolus
Any one can help me to find the correct answer for this question.
Methylxanthines such as caffeine or Theophylline enhance the lipolysis in adipose tissue by:
1. Inducing adenylate cyclase synthesis
2. Inducing Trigleceride lipase sytheseis
3. Inhibiting cyclic AMP
4.directly activating intracellular protein kinase
5.Enhancing binding epinephrine to extracellular membrane receptor
Methylxanthines such as caffeine or Theophylline enhance the lipolysis in adipose tissue by:
1. Inducing adenylate cyclase synthesis
2. Inducing Trigleceride lipase sytheseis
3. Inhibiting cyclic AMP
4.directly activating intracellular protein kinase
5.Enhancing binding epinephrine to extracellular membrane receptor
Thanks for the reply. Then how adenylate cyclase &/or cAMP increase the lipolysis ???. I am thinking about the effect on hormone sensitive lipase HSL ( I am not sure).
What about the protein kinase since the availability of cAMP activates protein kinase A specifically. I did found some connections between Protein kinase A and lipolytic pathway.
go through this......it present on every where on tongue where u can find taste receptor....
Taste receptors
All taste buds on the tongue and other regions of the mouth can detect umami taste independently of their location. The tongue map in which different tastes are distributed in different regions of the tongue is a common misconception. Biochemical studies have identified the taste receptors responsible for the sense of umami, a modified form of mGluR4, mGluR1 and taste receptor type 1 (T1R1 + T1R3), and all have been found in taste buds from any region of tongue.[27][28][29] The New York Academy of Sciences corroborated the acceptance of these receptors stating that "Recent molecular biological studies have now identified strong candidates for umami receptors, including the heterodimer T1R1/T1R3, and truncated tye 1 and 4 metabotropic glutamate receptors missing most of the N-terminal extracellular domain (taste-mGluR4 and truncated-mGluR1) and brain-mGluR4."[9]Receptors mGluR1 and mGluR4 are specific to glutamate whereas T1R1 + T1R3 are responsible for the synergism already described by Akira Kuninaka in 1957. However, the specific role of each type of receptor in taste bud cells remains unclear. They are G protein-coupled receptors (GPCRs) with similar signaling molecules that include G proteins beta-gamma, PLCb2 and PI3-mediated release of calcium (Ca2+) from intracellular stores.[30] Ca2+ activates the selective cation channel transient receptor potential melastatin 5 (TrpM5) that leads to membrane depolarization and the consequent release of ATP and secretion of neurotransmitters including serotonin.[31][32][33][34] Cells responding to umami taste stimuli do not possess typical synapses, but ATP conveys taste signals to gustatory nerves and in turn to the brain that interprets and identifies the taste quality.[35][36]
about que 2
(1) Shovel Shaped Incisors
In incisors, the marginal ridges may be especially prominent and enclose a deep fossa in the lingual surface. There are a variety of systems for grading this trait. Dahlberg and others subsequently have devised cast plaster plaques for standardized study.
The shoveling is most common in permanent and deciduous upper incisors, but can at times appear in lower incisors also. At times, the shoveling can create a pit on the lingual surface of central incisors.
so it can increase the risk of caries but not of periodontal disease
about last que
u r missing some thing they are asking
which of following is not correctly match with it's activated precursor
activated precursor for glycogen is udp-glucose not only glucose
Thnx.. 🙂, will recheck the last question again...about que 2
(1) Shovel Shaped Incisors
In incisors, the marginal ridges may be especially prominent and enclose a deep fossa in the lingual surface. There are a variety of systems for grading this trait. Dahlberg and others subsequently have devised cast plaster plaques for standardized study.
The shoveling is most common in permanent and deciduous upper incisors, but can at times appear in lower incisors also. At times, the shoveling can create a pit on the lingual surface of central incisors.
The highest frequencies (greater than 90%) are found amongst Asians and Native Americans and lowest amongst Europeans. Shovel shaped incisors appear in Homo erectus, suggesting that this is a very ancient trait.
so it can increase the risk of caries but not of periodontal disease
about last que
u r missing some thing they are asking
which of following is not correctly match with it's activated precursor
activated precursor for glycogen is udp-glucose not only glucose
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