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NBME 13 Answers

Block 1/Question#1
A 77-year-old woman dies in the hospital after a long ...
Interleukin-1 (IL-1)

Block 1/Question#13
An 18-month-old boy is brought to the physician because of ...
Iduronate sulfatase

Block 1/Question#19
A 22-year-old woman comes to the physician 3 months after she ...
Anterior to the sternocleidomastoid muscle

Block 1/Question#20
A 3-year-old girl is found to have a grade 4/6, loud, harsh, ...
Ventricular septal defect

Block 1/Question#25
A 32-year-old woman comes to the physician because of a ...
Myasthenia gravis

Block 1/Question#26
A 4-year-old boy is brought to the emergency department ...
Reaction step labeled by the letter 'E'

Block 1/Question#27
A 12-year-old African American girl is brought to the ...
Polymerization of hemoglobin with hypoxic conditions due to amino acid substitution in the β chain

Block 1/Question#29
A 43-year-old woman with metastatic colon cancer has ...
The agent being a humanized antibody

Block 1/Question#30
A 43-year-old man comes to the physician for a routine health ...

Block 1/Question#41
A 20-year-old man has cramping periumbilical pain. After ...
Interleukin-1 (IL-1)

Block 1/Question#43
An 18-year-old man has had temperatures to 38.3°C (101°F), a ...
T lymphocytes

Block 1/Question#48
A male newborn at 34 weeks' gestation is delivered vaginally. ...

Block 2/Question#1
A 15-year-old boy is brought to the physician by his mother ...
Type I (immediate) hypersensitivity

Block 2/Question#6
A female newborn is delivered at 34 weeks' gestation in an ...
Nitric oxide

Block 2/Question#8
A 5-month-old boy is brought to the physician because of a ...
Thyroglossal duct

Block 2/Question#9
In order to determine risk factors for death from coronary ...
Observational cohort study

Block 2/Question#21
A 36-year-old man who is seropositive for HIV has had a ...
Pneumocystis jiroveci (formerly P. carinii)

Block 2/Question#30
A 47-year-old woman comes to the physician because she wants ...
Activation of nuclear gene transcription

Block 2/Question#38
A 5-year-old boy is brought to the physician by his mother ...

Block 2/Question#41
A 23-year-old woman comes to the physician because of a ...

Block 2/Question#45
A 54-year-old man has a squamous cell carcinoma of the right ...
Loss of heterozygosity

Block 3/Question#5
A previously healthy 42-year-old Asian woman is brought to ...
Induction of cytochrome P450

Block 3/Question#6
Homologous pairing of chromosomes in prophase I is essential ...
Crossing over

Block 3/Question#7
A 32-year-old woman comes to the physician because she has ...

Block 3/Question#11
A 31-year-old woman is brought to the emergency department by ...
Desensitization of nicotinic receptors

Block 3/Question#14
A previously healthy 40-year-old man is brought to the ...
Increased protein degradation

Block 3/Question#15
A 33-year-old woman who is right-handed is brought to the ...
Voltage-gated Na+ channels

Block 3/Question#19
A study is conducted to evaluate the onset and course of ...

Block 3/Question#21
An autopsy is done on a 46-year-old woman who died of ...

Block 3/Question#30
A cluster of three cases of nosocomial pneumonia caused by a ...
Promote thorough hand cleansing before and after medical personnel visit each patient

Block 3/Question#31
A 23-year-old woman with type 1 diabetes mellitus is brought ...
Inability to produce hydroxy-halide radicals

Block 3/Question#35
A 25-year-old woman undergoes a radical mastectomy with ...
Compression sleeve

Block 3/Question#39
A young adult couple has been unable to conceive for the past ...
Seminal vesicles

Block 3/Question#45
A 25-year-old man with cystic fibrosis comes to the physician ...
Biofilm formation in the lower respiratory tract

Block 4/Question#2
An 18-year-old woman with mild mental retardation is brought ...
Apo B

Block 4/Question#7
A mouse melanoma, B-16, is highly metastatic. A clone of the ...

Block 4/Question#13
A 22-year-old woman comes to the physician for a follow-up ...
Antiphospholipid antibody syndrome

Block 4/Question#20
A previously healthy 32-year-old man is brought to the ...
Alcohol dehydrogenase

Block 4/Question#21
A 40-year-old woman is brought to the emergency department 30 ...
Vascular malformation

Block 4/Question#34
A 33-year-old woman comes to the physician because of a 16-kg ...
Cortical hyperplasia

Block 4/Question#35
A 55-year-old man with hepatic encephalopathy is brought to ...

Block 4/Question#36
A previously healthy 25-year-old man is admitted to the ...
Alveolar hyaline membrane

Block 4/Question#42
A 64-year-old woman comes to the physician because of a ...
Esophageal peristalsis: decreased; Lower esophageal sphincter tone: decreased

Block 4/Question#46
A 62-year-old man is brought to the emergency department ...
Pulmonary edema

Recent comments ...

... drjungly made a comment on nbme13/block3/q#7 (32 yo woman, 5 years inability to conceive)
 +0  upvote downvote
submitted by drjungly(0)

Normal hormone,normal male sperm study and normal menses: still can’t conceive then give TRY with clomiphene, that is Antagonist at GnRH receptor at Hypothalamas, Block Estrogen mediated inhibition of GnRH hence Increase release of GnRH>>>>>>inc. LH surge ovulation Bromocriptine - would be helpful if the pt has infertility due to INCREASE PROLACTIN. DES - is stopped in US due to clear cell carcinoma in young female born to mother. Ethinyl estradiol - bind estrogen recepto>>>>>inhibit GnRH >>>>no LH surge: no use (inc. Risk of endometrial carcinoma) Medroxyprgestroene - is progestrin —-bind progesterone receptor....is(component of morning after pill)

... drjungly made a comment on nbme13/block3/q#19 (Study of onset and course of cardiovascular disease in African American men and women)
 +0  upvote downvote
submitted by drjungly(0)

researchers want to know CV risk about African American populations but do not have data for every person.If a researcher wanted to learn whether being certain ethnicity increase a risk of particular disease, it would not be practical to study every individual from that ethnicity . Instead, the researcher might select a sample of the population. A sample is a smaller group of members of a population selected to represent the population. In order to use statistics to learn things about the population, the sample must be random. A random sample is one in which every member of a population has an equal chance of being selected. The most commonly used sample is a simple random sample. It requires that every possible sample of the selected size has an equal chance of being used.

... huyhoa1qh made a comment on nbme13/block3/q#21 (Autopsy of 46 yo woman, adenocarcinoma of colon)
 +0  upvote downvote
submitted by huyhoa1qh(0)

2,3-BPG created in RBCs during glycolysis. The production of 2,3-BPG is increased when oxygen availability is reduced, as occurs in chronic lung disease, HF& chronic exposure to high altitudes. Elevated levels of 2,3-BPG decrease Hb O2 affinity, allowing the release of more O2 in the peripheral tissue


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