3 Flashcards
Which enzyme is responsible for the conjugation of bilirubin?
glucuronyl transferase
What chemistry test is a sensitive indicator of iron deficiency?
serum ferritin
Which mediator cell binds the most to IgE antibody?
basophils
T or F: Type II diabetes mellitus requires insulin therapy.
false
The buffering capacity of blood is maintained by a reversible exchange between bicarbonate and what other ion?
chloride
In an electrophoretic separation, is the zones appear artifactually crescent-shaped, what is the most likely cause?
overload of sample
Spores found only in the cytoplasm of duodenal epithelial cells that stain red in a Weber stain indicate what organism?
Microsporidium sp.
What volume of urine is recommended for centrifugation for microscopic exams?
10-15 mL
Why are serum lead levels of little value?
they fluctuate rapidly, and do not remain positive for long after lead exposure
Black colonies on Tinsdale agar (indication a + Tinsdale reaction) is distinctive for what organism?
Corynebacterium diptheriae
Where are coagulation proteins found, in the plasma or serum?
plasma
What organism causes chronic sinusitis?
Scedosporium apiospermum
What organism causes otitis externa?
Aspergillus niger
What organism causes mycotic keratitis?
Fusarium sp.
What organism causes tinea pedis?
Trichophyton rubrum
What test confirms urobilinogen levels of 2.0 Ehrlich units or more, and what does it differentiate?
Watson-Schwartz, urobilinogen and porphobilinogen
Grey-white cobweb mycelium, a rim of black pigment, and failure to convert to a yeast at 35*C is characteristic of what organism?
Coccidioides immitis
CYP2D6 ultrarapid metabolizers (UM) would require what kind of dose of active drug, in comparison to an extensive metabolizer (EM)?
a higher dose
Which chromosome demonstrates a partial or full loci deletion in various forms of beta-thalassemia?
chromosome 11
What hyaline saprobic fungus has microscopic features similar to Coccidioides immitis?
Malbranchia sp.
T or F: Increased serum complement is a feature of SLE?
false
Where is follicle-stimulating hormone (FSH) produced?
pituitary gland
Zollinger-Ellison syndrome is characterized by a large (usually 20-fold) elevation of what?
gastrin
What virus causes Fifth Disease?
parvovirus
What virus causes Measles-Mumps?
paramyxovirus
Growth on chocolate agar, but not Thayer-Martin, of a Gram = cocci appearing singly or in loose clusters, that is assachrolytic and DNAse + indicates what organism?
Moraxella catarrhalis
What is the most common combination of ANA patterns?
homogenous and speckled
Target cells are typical in what kind of beta-thalassemia?
minor, intermedia, and major
What is the name for the glycated protein that is an index of carbohydrate management over a 2-3 month period?
HbA1c
What causes wick flow in electrophoresis?
excess heat
What lab test result would indicate that a sickle cell patient is in aplastic crisis?
decreased reticulocyte count
