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  #1  
Old 11-06-2013
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Wink Discussing few NBME 13 questions

dear friends ,

i have some qs form NBME13 and i need explanation for it

the Qs in the file

and the correct answer 1- E
2-C
3-D
4-B
5-D
6-B
7-A
8-D


Attachment has been removed because of copyright infringement

Last edited by admin; 11-06-2013 at 03:55 PM. Reason: removed attachment
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  #2  
Old 11-06-2013
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?
?
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Old 11-06-2013
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First things first, please dont go by the online answer keys, more often then not, they are wrong.

okay the first question; yeah its really easy to get tripped up on it, i did as well. Go to page 102 in FA2013; cyanide/CO inhibits complex IV, which is formed by cytochrome C. the process to complex V is actually what is inhibited, so the answer is E.

2. IL-1 is the answer. Apparently IL-1 is also known as osteoclastic activating factor, which is involved in osteoporosis. If you read the thread about NBME13 on StudentDoctor.net, they talk about this.

3. Aspirin induced Asthma, so excessive production of leukotrienes. Go look at your arachadonic acid metabolism pathway in FA.

4. Answer is B, loss of heterozygosity. The tumor cell shows the presence of M allele only, you have lost the n allele that is present in the normal cell gene.

5. Gait Ataxia is the answer- the man was an alcoholic, so alcoholism causes Cerebellar Ataxia- which causes Gait Ataxia

6. Biofilms. These organisms produce biofilms, thats how they keep causing infections. Its pseduomonas that produces pyocyanin.

7. Answer is A, its the first graph. The Calcium concentration in the SR will be high because the SR is what stores and pumps Ca ions: From wikipedia:

"The sarcoplasmic reticulum (SR), from the Greek sarx, ("flesh"), is smooth ER found in smooth and striated muscle. The only structural difference between this organelle and the smooth endoplasmic reticulum is the medley of proteins they have, both bound to their membranes and drifting within the confines of their lumens. This fundamental difference is indicative of their functions: The endoplasmic reticulum synthesizes molecules, while the sarcoplasmic reticulum stores and pumps calcium ions. The sarcoplasmic reticulum contains large stores of calcium, which it sequesters and then releases when the muscle cell is stimulated.[11][12] It plays a major role in excitation-contraction coupling.[citation needed]"

8. Answer is D, above the 9th rib. The other choices are either too far down or too far up. You want to get into the pleura, not the lung tissue itself. If you go below the rib you have a chance of damaging the vascular bundle as it sits just below the rib. If you go above the rib completely, you should be fine.
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Old 11-06-2013
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Quote:
Originally Posted by CisternaChyli View Post
First things first, please dont go by the online answer keys, more often then not, they are wrong.

okay the first question; yeah its really easy to get tripped up on it, i did as well. Go to page 102 in FA2013; cyanide/CO inhibits complex IV, which is formed by cytochrome C. the process to complex V is actually what is inhibited, so the answer is E.

2. IL-1 is the answer. Apparently IL-1 is also known as osteoclastic activating factor, which is involved in osteoporosis. If you read the thread about NBME13 on StudentDoctor.net, they talk about this.

3. Aspirin induced Asthma, so excessive production of leukotrienes. Go look at your arachadonic acid metabolism pathway in FA.

4. Answer is B, loss of heterozygosity. The tumor cell shows the presence of M allele only, you have lost the n allele that is present in the normal cell gene.

5. Gait Ataxia is the answer- the man was an alcoholic, so alcoholism causes Cerebellar Ataxia- which causes Gait Ataxia

6. Biofilms. These organisms produce biofilms, thats how they keep causing infections. Its pseduomonas that produces pyocyanin.
in this q the pt have PSEDOMONAS Infec ? and is the biofilms also by psedumonas , what i know that only staph epider cz biofilms.


7. Answer is A, its the first graph. The Calcium concentration in the SR will be high because the SR is what stores and pumps Ca ions: From wikipedia:

"The sarcoplasmic reticulum (SR), from the Greek sarx, ("flesh"), is smooth ER found in smooth and striated muscle. The only structural difference between this organelle and the smooth endoplasmic reticulum is the medley of proteins they have, both bound to their membranes and drifting within the confines of their lumens. This fundamental difference is indicative of their functions: The endoplasmic reticulum synthesizes molecules, while the sarcoplasmic reticulum stores and pumps calcium ions. The sarcoplasmic reticulum contains large stores of calcium, which it sequesters and then releases when the muscle cell is stimulated.[11][12] It plays a major role in excitation-contraction coupling.[citation needed]"

8. Answer is D, above the 9th rib. The other choices are either too far down or too far up. You want to get into the pleura, not the lung tissue itself. If you go below the rib you have a chance of damaging the vascular bundle as it sits just below the rib. If you go above the rib completely, you should be fine.


thank .... you
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Old 11-06-2013
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It's not given in first aid that pseudomonas cause biofilms.. But the stem points you in the direction of what the organism is.. Also biofilms are how organisms just hang around and keep causing disease.
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Old 11-06-2013
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okay i got it

thank you
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Quote:
Originally Posted by dr.mac2013 View Post
okay i got it

thank you
No problem, if you have any other questions from NBME13, dont hestitate to put them up .
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Old 01-12-2014
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Default Hey,

Hey had few confusions concerning NBME13
Que 13
(Case of CHF).... Which of the following best describes function of product secreted by atrial myocytes in this patient?
Im confused with two answers:
1. Decreased GFR
2. Inhibition of Renin release

The answer given is " Inhibition of Renin Release"
Any idea??

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Old 01-12-2014
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Quote:
Originally Posted by Mukti View Post
Hey had few confusions concerning NBME13
Que 13
(Case of CHF).... Which of the following best describes function of product secreted by atrial myocytes in this patient?
Im confused with two answers:
1. Decreased GFR
2. Inhibition of Renin release

The answer given is " Inhibition of Renin Release"
Any idea??

That's the function of ANP....
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Old 01-13-2014
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Default HEY! I solved nbme 13 today and got 160 ques correct.....

HEY! I solved nbme 13 today and got 160 ques correct.....
hey my exam is in 1 week...can u guys plz let me knw.....hw much predictive is nbme 13
i wanna score 240+
and offline 160 correct ques is correspond to hw much marks ???
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Old 01-13-2014
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Quote:
Originally Posted by sidmahajan View Post
HEY! I solved nbme 13 today and got 160 ques correct.....
hey my exam is in 1 week...can u guys plz let me knw.....hw much predictive is nbme 13
i wanna score 240+
and offline 160 correct ques is correspond to hw much marks ???
do it online, cause offline doesnt correlate well at all.
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Old 01-14-2014
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Quote:
Originally Posted by CisternaChyli View Post
do it online, cause offline doesnt correlate well at all.
hi.plz tell me nbme 13.i have 2 weeks from my exam.my score in nbme 12 was 221.which subject,s question are tough in nbme 13?plzz guide me well
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