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19 yo man stabbed in abdomen. Denies starting fight and intends to 'get even'. Incarcerated for past 3 yrs for armed robbery but says he was 'set up'. Nov 08, 2015 Nah I don't think so. While it may have been more accurate for us, the general trend still seems to be it underpredicts. Maybe if it starts happening more from here on out, I haven't read about a lot of recent experiences. Most of the NBME 19 threads I perused were from last year. Download Nbme 19 answers.docx. Save Nbme 19 answers.docx For Later. Download NBME 17. Save NBME 17 For Later. NBME Subject Exams. It's easy for us to feel helpless in the face of community-sanctioned extortion by the National Board of Medical Examiners.

it's marcus gunn pupil,you should know that it's decreased bilateral pupillary constriction when light is directed to affected eye.

the lesion is in the right optic nerve(afferent) as the question describes lesion when flash is directed to right eye.

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odds ratio equals a*d/b*c
it's a direct question,you should know the equation well
2*2 table is present in FA ,please know it by heart

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let's analyse keys:

alcoholic+foul smelling sputum(means bacterial infection ie.anaerobes)+episodes of unconsciousness

this is most probably aspiration pneumonia which may lead to lung abscess (the x-ray finding in the choice)

if you don't know how abscess looks like in x-ray,google search will help a lot.

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an easy question,remember that accumulation of lactate causes a decrease in ph and eventually fatigue .

lack or decrease in oxygen supply during heavy exercise will shift metabolism to anaerobic metabolism,which will lead to depletion of glycogen and accumulation of lactate

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factors determining risk of postmenopausal osteoporosis are:

Nbme 19 Explanations

ethnicity: african americans have low risk than caucasians

although socioeconomic history (choice f) may reflect diet and nourishment status , but choice b (dietary history) is more specific

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a typical case of rheumatoid arthritis

middle aged woman + affection of proximal interphalangeal joint with sparing of distal joints
biopsy of RA will show proliferative granulation tissue which is known as pannus (choice d)

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the x-ray in the question shows hyperlucent area in left chest most likely pneumothorax,

sudden left side sharp pain + dyspnea support diagnosis
in pneumothorax: air entry to pleura will lead to loss of negativity of intrapleural pressure (choice c)

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Exercise distends the vessels, reducing their resistance to blood flow. Thus, the base of the lung receives more blood flow than the apex. During exercise, vessels can be recruited, increasing the total cross-sectional area and reducing resistance. Lung volume also passively alters pulmonary vascular resistance

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pulmonary hypertension leads to increase right ventricle afterload

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very high beta human chorionic gonadotropin as well as large uterus is most likely a case of mole
in ectopic pregnancy this hormone is slightly increased

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of course it's vit D which is responsible of Ca absorption

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both warfarin and dicumarol are structurally related
they inhibit enzyme epoxide reductase which activate vit K ,inducing vit K deficiency like state

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metronidazole causes disulfiram like effect,which is shown in the question as vomiting , flushing and headache

metronidazole is the first choice to treat trichomonas vaginalis

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propranolol is a non selective beta antagonist:

beta 1 antagonism >>> decreases heart rate&contractility >>> decreases cardiac output

beta 2 antagonism >>> vasoconstriction >>> increases total peripheral resistance

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you should know mechanism of aspirin by heart and the step on diagram

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The patient will have shallow and rapid breathing to compensate for the decreased tidal volume.as deep breaths will cause pain.

nothing is wrong in the airways (obstructions) the airway resistance remains same !!

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blood-testes barrier are formed from tight junctions between sertoli cells

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age is the clue

before 18 >>> conduct disorder

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AMP stimulates glycogen phosphorylase via addition of the phosphate group on it ( remember it through glucagon pathway),this increases affinity of enzyme to substrate

And as you can clearly see from the enzyme substrate curve that it acts as an activator

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20- b
heparin induced thrombocytopenia,an easy question

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US detects nuchal translucency but NT is just screening. Since there is predisposition we should do chorionic villi sampling
Chorionic villi sampling can actually detect chromosomal