Uworld NTK_week1 Flashcards
What deficiency can happen with biliary disorders, exocrine pancreatic insufficiency, or intestinal malabsorption?
Deficiency in Fat-Soluble vitamin.
Vitamin A ~ night blindness and hyperkeatosis
What biliary diz is ~w/ middle-aged WOMEN?
Primary Biliary Cholangitis (PBC); destruction of small bile ducts in the liver.
Have generalized pruritus d/t bile acid accumulation in the skin.
Late-onset familial Alzheimers ~w/ ?
Apo-E4 genotype
Early-onset familial Alzheimers ~w/ ?
three gene mutations:
- APP (Chr. 21)
- Presenilin 1 (chr.14)
- Presenilin 2 (chr. 1)
M3 receptors on endothelial surface of peripheral blood vessels. activation leads to what?`
promotes NO synthesis and increase cGMP which activate myosin light chain phosphatase ===> VSMC relaxation and vasodilation.
In contrast to M3 activation at other organs, which does muscle CONTRACTIONS!!!
Proteins ~w/ gap junctions?
Connexins, for intracellular communications
Proteins of tight junctions?
Claudins, occulins; (Para cellular barriers)
Proteins of adherins junctions?
Cadherins for cellular anchor)
Proteins of desmosomes?
Cadherins (desmogleins, desmoplakin)
Hemidesmosones proteins?
Integrins (Cellular anchor)
What biostats number is the probability of developing a disease over a certain period of time?
-affected / # of total subject pop.
Risk!
What drug’s MOA is a N-Methyl-D-Aspartate receptor antagonist?
PCP (phencyclidine)
NDMA
What drugs can help accelerate fetal lung maturation by stimulating surfactant production?
Betamethasone or Dexamethasone
give to decrease risk of neonatal RDS
Caviare TB is usually due to primary infection or reactivation?
Reactivation of mycobacterial infection
____ abscesses are common complications of aspiration pneumonia?
Lung Abscesses.
high risk pt; alcoholics, dementia, chronic illness
How do you Tx narcolepsy?
scheduled daytime naps
psychostimulants (Modafinil) for daytime sleepiness
What are the 3 Sx of Anaphylatic shock?
What do you use to Tx it?
- Vasodilation
- Increased vascular permeability
- Bronchoconstriction
Tx w/ Epi. it stimulates alpha-1 receptors of both cutaneous and viscera vasculature.
Stim of beta-2 ==> bronchodilation
What amino acid is the precursor for Serotonin?
Tryptophan
How do you Tx serotonin syndrome?
anti-histamine with anti-serotonergic properties like Cyproheptadine.
How do you Tx serotonin syndrome?
anti-histamine with anti-serotonergic properties like Cyproheptadine.
What are the physical features of a Pt. with Fragile X syndrome?
- Neurobehavioral problems
- Prominent forehead
- Large ears
- Long narrow face
- prominent chin
- MACRO-orchidism, Large Balls!!!
What is the major ADR with Sccinylcholine drug use, esp. in Pt. with severe burns, myopathies, enervating injuries?
HyperK+
What accounts for the difference in the values between minute and alveolar ventilations?
Dead Space
What are the premature stop codons?
UAA
UAG
UGA
Myasthenia gravis and Goodpastures are examples of what immune response?
Type 2 hyper-sensitivity
What is the MOA of Dantrolene?
Inhibition of Ca2+ ion relase from sarcoplasmic reticulum of skeletal m.
Used to Tx Hypertermic Maligantant syndrome of anathesia
AND
Tx Neuroleptic Malignat Syndrome (NMS) from anti-psychotic medication overdose!
The toxin produced by what two bacteria that causes bloody diarrhea has the same action of inhibiting the 60S ribosomal subunit in human cells –> blocking protein synthesis by preventing tRNA binding?
Vero-cytotoxins of Shiga and EHEC
What is the best drug of choice to Tx pregos with VTE (other clotting/anti-coag)>
LMWHeperins. Enoxaparin
Neonate comes to clinic with constipation, lethargy, hypotonia, macroglossia, umbilical hernia and large anterior fontanelle. What is the Dx and what is the dX and the associated pathophysio?
Congenital HypOthyroidism
Neonate aSx at birth b/c mom’s T4 is still in their system. takes a few months to show sX.
What adverse shit can happen if you mech-vent a pt. who has COPD with excessively high Oxygen?
Pt. will get increased CO2 retention (O2-inducecd hypercapnia) ===> confusion and depresses consciousness.
This is d/t the reversal of hypoxic pulmonary vasoconstriction –> imcreases physiologic dead space. (V-Q mismatch)
“dead space ventilation”
What STD typically presents as a single PAINLESS genital lesion (chancre) after initial infections?
Syphilis (T. pallidum)
What derm layer does the spleen come from and what is it’s blood supply?
Mesodermal (dorsal mesentery)
splenic artery (branch of celiac trunk, major supplier to foregut)
Hyponatremia is a lab abnormality that occurs with pneumonia caused by what bacteria?
Legionella.
Think: dry couch, GI and Neuro issues, and recent cruises (travel with stranger water sources)
Infection with what bacteria can result in cold aggultinin formation?
Mycoplasma
What is the adverse effect of combo of a b-blocker and a CCB?
additive chronotrophic effects ==> severe bradycardia and hypotension.
Leukocyte Adhesion Deficiency is ~w/ the absence of what antigen?
CD18; needed for the formation of integrins to adheare to endotheial surfaces.
LAD ~infections lack purulence and have persistent leukocytosis b/c they can’t migrate out of blood vessels.
What is the func. of EGF?
mitogenic influence on epitheial cells, hepatocytes and fibroblast. EGF does NOT play a role in angiogenesis like VEGF or FGF-2.
What are the substances that drive angiogenesis?
VEGF & FGF-2
What Sx are pathognomonic for a larde patent ductus arteriosus complicated by eisenmenger syndrome (reversal of shunt flow from left-to-right to right-to-left)
differential clubbing and cyanosis in the toes WITHOUT blood pressure or pulse discrepancy.
What does PTH do to serum Ca+ and serum phosphate levels?
PTH increases serum Ca2+ and
DECREASES serum Phosphate (via urinary excretion)
Photosensitivity dermatitis, diarrhea, dementia think?
Pellagra, Vitamin B3 (Niacin) Def.
XP is and Auto-R disorder d/t a defective nucleotide excision repair often caused by a deficient what?
UV-specific endonuclease
What does the 3’ –> 5’ exonuclease mean?
“proof-reading” ability of DNA polymerase.
~w/ Hereditary nonpolyposis colon cancer associated with DNA mismatch repair gene mutation.
S3 in a older man –> ?
d/t increase left-ventricular end-systolic volume.
which occurs in the setting of left ventricular systolic failure
Auto-Abs against Desmosomes ==> ?
Pemphigus vulgaris
What causes bullous pemphigoid?
Auto-Abs to hemidesmosomes
Rheumatic fever/heart diz is a common cause of what heart sound in underdev. nations?
mitral regurg; blowing holosystolic murmur
Loss of neurons in the substantia nigra occurs is what disease?
Parkinsons
Damage to nucleus ambiguous of the medulla –> ?
myoclonus
Increased risk of intracerebral hemorrhage and seizures –> ?
Cavernous hamangiomas
hyperpigmented macules and increase ICP and headaches –> ?
Cafe au Lait spots, NF-1 schwann cells, neural crest cells.
The Phrenic n. is derived from what nerve roots?
C3-C4-C5 keeps you alive.
Muscle weakness and atrophy, auto-dom, and cataracts –>
Myotonic Dystrophy (d/t increased number of trinuc repeats.
also can Sx of frontal balding and gonadal atrophy.
Where in the ribosome does the first tRNA enter for the AUG (Start) codon (methionine)
P-site
Binding of aminoacyl tRNA at the A-site req. what?
GTP binding and hydrolysis.
and other elongation factors
Which ribosomal subunit binds upstream of the 5’ end and travels downstream until the AUG codon is encountered?
The small subunit 40s
What is req. during aminoacylation (tRNA charging)?
two ATP
“A for activation”
What enzyme adds UDP-glucose to a pre-existing glycogen molecule or glycogenin, a small protein that acts as a primer for glycogen?
The breaking of phosphate bonds in UDP is what provides the energy to form the bond between glucose and the glycogen chain.
Glycogen synthase
Trisomy 21 has 3 copies of what that increases risk for EARLY onset alzheimers?
3 copies of amyloid precursor protein gene
LATE onset alzheimers –>
ApoE mut.
In the first days of life, neonate has dilated stomach & proximal duodenum “double bubble sign” ==> ???
Trisomy 21 increases risk of Duodenal atresia. (MC in down synd.)
Prenatal screening with decreased maternal serum AFP and increased nuchal translucency ==>?
Trisomy 21
harsh, crescendo-decrescendo SYSTOLIC ejection murmur at the right second intercostal space == ??
aortic stenosis.
bicuspid aortic valve mcc
mid-systolic click and a late systolic murmur heard of apex == ???
Mitral Valve Prolase
Prolonged exposure to loud noises fucks with what?
hearing loss d/t damage to the stereociliated hair cells of the organ of corti
Fat guy with normal A-a gradient?
Obesity HYPOventilation syndrome.
chronic fatigue, dyspnea, PaCO2 > 45mmHg while awake.
Best pX indicator of bladder cancer?
Tumor stage; degree of invasion into the bladder wall and adjacent tissue.
Rod-shaped, “tennis racket”, cells, Langerhans cells?
Liver. Landerhans cells histiocytoses.
aka: Birbeck granules
How do you diff. schizoaffective disorder vs. schizophrenia?
schizoaffective is psychosis in the ABSENCE of significant mood symptoms (manic or depressive disorders)
Fungus that appears red on mucicarmine stain and clear “halo” with india ink
Cryptococcus neoformans, only one with polysacc capsule
fungus, with septate hyphae on silver stain?
Aspergillus fumigatus
fungus, budding yeast with pseudo-hyphae on KOH?
Candida
What layer do you biopsy if you are looking for Meissner and auerbach plexus?
submucosal