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Practice exam
4 blocks
76
Science
Professional
05/26/2012

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Term
Injury to what structure in the lung causes ARDS
Definition
endothelium

(robbins says it's endothelium, epithelium, or, more commonly, both)
Term
For each cardiac conduction velocity, give the structure:
1) 1.1 m/s
2) 0.05 m/s
3) 2.2 m/s
4) 0.3 m/s
Definition
1) Atrial muscle
2) AV node
3) His-Purkinje system
4) Ventricular muscle

Remember, AV node is slowest, Purkinje cells are fastest
Term
person with "lump in throat" and a normal physical exam (including barium swallow). May also complain of anxiety.
Definition
Globus Hystericus

Can also be associated w/ GERD & achalasia, but this probably wouldn't be asked.
Term
Electrophoresis of a cell indicates DNA fragments in multiples of 180 bases
Definition
Apoptosis (called DNA laddering)
Term
Is extreme thirst a symptom of antimuscarinic overdose (e.g. atropine)
Definition
yes
Term
Children of a parent have a genetic disease that there is no family history for.
Definition
Germline mosaicism (i.e. Germ cells are mutated during embryogenesis, but the rest of the embryo is fine)

(only AD or X-linked diseases would work here)
Term
Inheritence of osteogenesis imperfecta
Definition
Autosomal dominant
Term
Daily foot inspection should be performed by diabetics?
Definition
yes
Term
IL2 is only produced by?
Definition
activated T-lymphocytes

Stimulates growth & differentiation of T, B, & NK cells
Term
Name each intercellular connection:
1) prevents passage of ions/water
2) Ca-dependent. Actin-linked
3) Colored. Keratin-linked
4) attaches to basement membrane
Definition
1) tight junction
2) Cadherens
3) Macula adherens (desmosomes)
4) Hemidesmosomes
Term
What stimulates:
1) Secretin release (inc pancr bicarb; inc bile; dec gastric acid)
2) CCK (inc pancreatic secretions & gallbaldder contractility; decrease gastric emptying & Oddi tone)
3) Somatostatin (decrease all GI actions)
Definition
1) Acid & FA in duodenum (S-cells)
2) FA & AA In duodenum & jejunum (I-cells)
3) Acid & FA in duodenum (D-cells)
Term
What artery gives the:
1) Dorsalis pedis pulse
2) Most susceptible to injury in knee dislocations (anterior & posterior)
Definition
1) anterior tibial (runs w/ deep peroneal, which innervates dorsiflexors of the foot)
2) Popliteal artery (runs deep in the popliteal fossa & is fixed in position by adductor magnus & soleus)
Term
Tender uterus & foul-smelling sputum following delivery
Definition
endometritis.

World says Bacteroides is most commonly implicated. Sherris says that clostridium perfringens can infect retained tissue.

Treatment seems to be Metronidazole, so bacteroides seems like a reasonable choice.
Term
1) Guy who gets pissed channels his anger into a workout

2) Guy who is angry at someone punches a hole in a wall
Definition
1) Sublimation

2) Displacement
Term
Name interview technique:
1) "I can understand your difficulties"
2) repeat back what the patient said to you to show you are listening
3) "This sounds like it has been very hard for you" (expressing concerns for well-being)
4) Draw attention to discrepancies in pts statements
5) Encourage pt to talk ("tell me how...")
Definition
1) Empathy
2) Reflection
3) Support
4) Confrontation
5) Facilitation
Term
Headaches, chronic nasal discharge, atrophic nasal mucosa, thin nasal septum. Septum may perforate. oropharyngeal ulcers possible. Osteolytic sinusitis.
Definition
Cocaine abuse
Term
Chronic nasal congestion worsens w/ abrupt changes in temperature or humidity; or exposure to odors or alcohol. Headaches, anosmia, and sinusitis are often reported
Definition
vasomotor rhinitis (aka perennial nonallergic rhinitis )

there is no tissue eosinophilia or allergic stimulus.
Term
2 main structures in the GI tract that secrete Bicarb-rich fluid?
Definition
Pancreatic duct & epithelial cells of the biliary tree.

Bruton's glands also secrete a bicarb rich mucus. This protects the proximal duodenal bulb (i.e. before the ampulla of vater). Since secretions here are decreased by sympathetic stimulation, Guyton hypothesizes this is why "excitable" people can get ulcers in the prox duodenum

NOTE: SI secretions are almost exactly extracellular fluid, except it's slightly alkaline (why you get met acidosis w/ diarrhea)
Term
What is the cuttoff for acute stress disorder vs PTSD
Definition
<1 month (4wks) of Sx = acute stress disorder

Acute stress disorder commonly has dissociative symptoms
Term
Male w/ difficulty swallowing, facial&tongue fasciculations. Pedigree shows X-linked pattern & anticipation
Definition
Kennedy disease (X-linked bulbospinal musclar atrophy)
Term
When the husband has hemophilia. What is the chance the kids will have it?
Definition
0%

I can't believe you got this wrong. You are so dumb.
Term
Definition of exudate?
Definition
LDH >0.6 serum LDH

Protein >0.5 serum protein
Term
Old alcoholic w/ Lhermitte's sign & peripheral neuropathy?
Definition
B12 deficiency

I put it was MS, but Lhermitte's sign can be associated with a ton of stuff, pretty much anything affecting the CNS or cervical spine area
Term
2 causes of myasthenia gravis
Definition
Both are autoimmune:

70% have hyperplastic thymus glands (Goljan says there are actually germinal follicles in the thymus, but I can't substantiate that anywhere)

30% have thymomas (a paraneoplastic syndrome)
Term
Na+, K+, NH3, & glucose [] in DKA?
Definition
UP: K+, NH3 (from protein breakdown), Glucose

Down: Na+ (Na drops 1.6 mEq/L every 100mg/dL rise in glucose; Na+ is wasted in urine from osmotic diuresis)

NOTE: total body K+ is depleted, but serum K+ is inc b.c. no insulin
Term
6 things causing hyperkalemia?
Definition
1) Insulin def
2) Beta blocker
3) Acidosis
4) Hyperosmolarity
5) Digitalis
6) Lysis
Term
1) FSH levels in androgen insensitivity syndrome?

2) Klinefelters?
Definition
1) Normal

2) Increased
Term
3 complications of newborn infants that recover from RDS
Definition
1) Necrotizing entercolitis
2) PDA
3) Interventricular hemorrhage

(NOTE: retinopathy of prematurity & bronchopulmonary dysplasia are consequences of treatment)
Term
Infant gets RDS. Loses brainstem reflexes (suckling/swallowing). Bloody CSF. Dies in a few days. Autopsy shows clot in ventricle
Definition
Intraventricular hemorrhage (germinal matrix hemorrhage)

This is common in kids w/ cerebral palsy

ASIDE: germinal matrix is important for development of the cerebral cortex. It is a highly vascularized tissue that lies just deep to the ependymal cells. Neurons & glia migrate out of it to populate the cortex.
Term
Name antiarrhythmic:
1) Person develops interstitial infiltration. If not discontinued, will progress to irreversible fibrosis.

2) Pleuritis (secondary to a syndrome cause by this drug)
Definition
1) Amiodarone

2) Procainamide (b.c. of drug-induced SLE)
Term
HR & end-systolic LV volume if given nitroglycerine acutely (no other meds on board)
Definition
HR increases LVESV decreases (inotropic effects)

Nitroglycerin is a venodilator>> arterial dilator; It increases blood flow to the coronary arteries & thus decreases angina.
Term
Antibiotic resistance that lowers intracellular concentration
Definition
pumps. These pumps are usually driven by the H+ gradient (cotransport w/ drug out of cell). Na & ATP may also be used.

Question was ridiculous: scientist makes media acidic & drug accumulates. I thought the drug would become uncharged & diffuse across.
Term
15-20 mostly hydrophobic amino acids at the N-terminal of a protein that targets it to the ER
Definition
signal recognition particles

If this is lost, protein will accumulate in the cytoplasm
Term
how is testosterone maintained at a high concentration in the seminferous tubules/epidymis?
Definition
Sertoli cells secrete androgen-binding-protein (ABP) into lumen. These bind tightly to testosterone & DHT secreted by the leydig cells
Term
Red safrinin O stains what?
Definition
Gives bright red color to:

1) Cartilage: binds ground substance (keratin sulfate & chondroiton sulfate), not collagen!

2) mucin
3) mast-cell
Term
PaO2 & PaCO2 in PE? PH?
Definition
both PaO2 & PaCO2 will be decreased (V/Q mismatch & hyperventilation)

PH will be increased
Term
Structure & function of platelet activating factor?

What does it signal through?
Definition
PAF is glycerol-linked lipid. At low concentrations, it is a vasodilator & increases adhesion proteins on endothelium. It can also cause platelet activation & aggregation

It signals through Gq coupled GPCR
Term
penetrance & expressivity of NF1
Definition
100% penetrance w/ variable expressivity
Term
Mechanism of Red-man syndrome?
Definition
non-IgE mediated mast cell histamine release. Treat w/ antihistamines
Term
Crampy abdominal pain, blood in stools, pain on palpation, decreased bowel sounds, weak pulses or cardiac decompensation
Definition
Ischemic colitis

Early = mucosal hemorrhage w/ patchy necrosis
Middle = bowel wall becomes edematous
Late = transmural infarction & perforation
Term
Inheritance of osteogenesis imperfecta?
Definition
Autosomal dominant
Term
Prolonged fasting (>12 hrs, glycogen depleted) produces a hypoglycemic, hypoketotic state
Definition
Acyl-CoA dehydrogenase (medium chain variant is most common)
Term
change in Vmax & Km when more enzyme is added to a reaction?
Definition
Vmax increases, Km stays the same
Term
what is the most important risk factor for developing DJD (osteoarthritis)?
Definition
age
Term
In eukaryotes:
28S, 18S, & 5.8S rRNA are created how? Which rRNA is the only one to be transcribed by RNApolIII?
Definition
RNApol-1 transcribes a singe 45S rRNA which is subsequently cleaved into the different units

RNApolIII makes 5S rRNA. This is the only rRNA not to be made by RNApol-1
Term
pt w/ mouth ulcer, perineal abscesses & chronic diarrhea
Definition
Crohn's disease; most commonly affects the terminal ileum (RLQ), but can cause transmural inflammation anywhere from the mouth to the anus.

No lymphadenopathy, arthritis, or skin rashes.

Complications include: Malabsorption, Ca-oxylate stones, fistulas, perineal abscesses.; Carcinoma only if colon is involved
Term
1/2 life of warfarin?
Definition
40 hrs. takes 4-5 1/2 lives to reach steady state = 160hrs
Term
person w/ poor diet & no outdoor time gets a compression fracture
Definition
Osteomalacia (vitD deficiency)
Term
Name the pathology:

1) back pain that radiates to buttocks & legs that increases w/ extension & decreases w/ flexion
2) Radiating pain to legs, usually unilateral, no sexual dysfunction
3) Non-severe-non-radiating pain to legs. bilateral. Sexual dysfunction.
4) leg claudication, atrophic skin, ulcers on toe
Definition
1) spinal stenosis
2) Cauda equina syndrome
3) Conus medularis syndrome
4) PVD (e.g. femoral artery; commonly from diabetic complications)
Term
Gray rami house pre or post synaptic neurons?
Definition
post-synaptic autonomic nerons; These neurons are UNMYLELINATED, thus the rami are gray

NOTE: white communicantes only exist where the intermediolateral cell column exists (i.e. T1-L2)
Term
1) Most common cause of aseptic meningitis?
2) Most common cause of viral encephalitis?
Definition
1) Enterovirus (picornavirus) = 90%
2) probably HSV1, but it's not certain. It definitely is #1 in kids (remember temporal lobe preference)
Term
Differentiate:
1) Genetic/locus heterogeneity
2) Polyploidy
3) Pleiotropy
4) Heteroplasmy
Definition
1) Mutations at different loci (genes) can produce same phenotype (e.g. marfanoid habitus in marfans, homocysteinuria, MEN2b)
2) Multiple chromosomes
3) 1 gene can cause mulitple effects (e.g. osteogenesis imperfecta)
4) variable expression in mitochondrial inheritance due to different amounts of affected mtDNA in zygote
Term
about how many ATP from 1 glucose (w/ full TCA cycle)
Definition
~38 (this is debatable)

you get 2 from glycolysis

2/38 = 1/19 =~5%
Term
bacteria associated w/ reiters
Definition
Chlamydia, Campylobacter, Salmonella, Shigella, Yersinia (all are GI, except first)
Term
Prader willi syndrome. Both Chr15's are from who?
Definition
mother (i.e. paternal copy is lost)
Term
What layer is thickened in a callus?
Definition
stratum corneum
Term
LH/FSH ratio in PCOS?
Definition
high
Term
Serum gastrin levels in pernicious anemia?
Definition
increased
Term
What anticoagulant do you use w/ artificial heart valve?
Definition
Warfarin (antiplatelet therapy may be used adjunctively)
Term
Nephrotic syndrome in HIV pt
Definition
FSGS most common. "collapsing" variant is specific to HIV pts. This variant is also the worst.
Term
Say Pax3 or HoxA-13 for each:
1) Part of a highly conserved gene family that guide development from early embryogenesis to final differentiation.
2) Short thumbs, small feet, short big toes, GU abnormalities (e.g. bicornate uterus, hypospadius)
3) Heterochromia irides, Poliosis (area of hypopigmentation, esp in hair), dystopia canthorum, and deafness
Definition
1) Hox genes
2) HoxA-13: Hand-foot-genital syndrome
3) Pax-3: Waardenburg syndrome
Term
This antidiabetic drug will increase Glut4 receptors on adiopose & cause the adipose to terminally differentiate
Definition
Thiazoladindiones
Term
2 sinuses affected in blowout fracture?
Definition
ethmoid & maxillary
Term
MCA infarct would cause what visual disturbance?
Definition
homonymous hemianopia

I put unilateral central scotoma b.c. I thought they were pointing to the choroidal artery); other things that can cause UCS are MS (optic neuritis), or unilateral macular disease
Term
does aspergillus invade vasculature?
Definition
yes (route of dissemination in immunocompromised)

So does rhizopus/mucor
Term
why does octreotide decrease bleeding from varices?
Definition
b.c. it decreases splanchnic blood flow by inhibiting the hormones responsible for splanchnic vasodilation (e.g. VIP, glucagon)
Term
used to screen for carcinoid syndrome & medullary carcinoma of thyroid?
Definition
pentagastrin:
Carcinoid = pentagastrin-stimulated serotonin test

Medullary thyroid: pentagastrin stimulated calcitonin test
Term
what 2 cytokines do Th1 cells secrete?
Definition
IL2 & IFN-gamma (IFN-gamma inhibits Th2)
Term
For antibodies:
1) Which end is the C-terminus?
2) Where does complement bind?
3) Which segment has carbohydrate side-chains?
4) Which segment doesn't interact w/ the adjacent segment?
Definition
1) Fc end
2) Hinge region
3) CH2 (hinge region)
4) CH2 (hinge region)
Term
function of TdT?
Definition
it's a DNA polymerase that adds bases to the 3' end of DNA strands without a template during VJD recombination in order to produce junctional diversity (works alongside RAG, which cleaves the DNA to begin with)
Term
Define Ig:
1) Allotype
2) Isotype
3) Idiotype
Definition
1) Species specific (match transplants)
2) Fc
3) FAB
Term
Which cytokine:
1) Triggers acute phase protein synthesis?
2) Septic shock?
3) Cachexia?
4) Fever (2 + non-cytokine)?
5) Upregulate ICAM & VCAM
Definition
1) IL6
2) TNF-alpha
3) TNF-alpha
4) IL1 & IL6 + PGE2
5) IL1 & TNF-alpha
Term
what 3 cytokines activate NK cells?
Definition
IFN alpha & Beta + IL12
Term
CD14
Definition
coreceptor for the LPS TLR (found on macrophages)
Term
Name bugs that rearrange their antigens to evade immunity:
1) Bacteria (3)
2) Virus (1)
3) Parasite (1)
Definition
1) Salmonella (2 flagellar variants); Borrelia recurrentes (relapsing fever); N.gonorrhea (pilus protein)

2) Influenza

3) Trypanosome (programmed rearrangement)
Term
Things you give passive antibodies for:
Definition
HepB
Tetanus
Botulism
Rabies (but is still fatal almost always)
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