Angiotensin is an oligopeptide in the blood that causes vasoconstriction, increased blood pressure, and release of aldosterone from the adrenals.
A major action of angiotensin II is:
A hapten is an incomplete antigen.
All of the following cellular antigens are important to an immunohematologist except:
What additional fraction would be seen if plasma rather than serum was subjected to electrophoresis:
The mandatory waiting period between blood donations is 56 days, or eight weeks.
The accepted interval between blood donations is:
Name the comprehensive written safety plan detailing the proper use and storage of hazardous chemicals in the workplace.
Duffy antigens are rendered inactive by enzyme treatments since the enzyme will remove the sialic acid from the RBC membrane. This process destroys: M, N, S, s, and Duffy antigens. The process enhances the reactions for Rh, Kidd, Lewis, I, and P antigens.
When performing an antibody panel, which one of the following antigens will be rendered inactive by enzyme treatment?
Provide the equivalent measurement for 1 centimeter.
Question options:
The conidia of Exophiala species are produced within phialides that extrude the conidia in tight, ball-like clusters.
The large, drum stick-shaped muriform macroconidia of Alternaria species are arranged in short chains; the small, elliptical conidia of Cladosporium species are arranged in both long and short, branching chains.
Which of the following dematiaceous fungal species produce conidia in clusters?
21 CFR 606.65 states, "Supplies and reagents shall be used in a manner consistent with instructions provided by the manufacturer."
The correct answer is A. The reagents must be used according to the manufacturer's instructions for use. If the instructions say one or two drops may be used and the facility procedures also allow one or two drops, then there is no problem with the staff members choosing to use two drops.
While equipment must be calibrated, it does not generally influence the number of drops used.
Staff members often ask co-workers and colleagues from other facilities how to perform tasks, but it is the manufacturer's instructions for the operation of equipment and the use of reagents that must be followed.
A laboratory employee who is performing an internal audit of routine ABO and Rh typing procedures notes that a technologist places two drops of Anti-D in a tube, centrifuges the tube for 20 seconds, and reads the reaction using a magnifying mirror. When questioned about the procedure, the technologist indicates that most staff use two drops of Anti-D reagent because the reactions are stronger with two drops. In addition to reviewing the facility procedure manual, what should be done to ensure regulatory compliance?
The beta hemoglobin chain loci are found on which chromosome?
Anti-A, anti-P, anti-Leb, and anti-M all react best at 4o C as they are predominantly IgM antibodies. Other antibody group choices above include IgG antibodies such as anti-K, anti-s, anti-S, and anti-Fya, anti-Lub, etc. which react best at 37o C.
Which of the following groups of antibodies generally reacts most strongly at 4o C:
Hybridization is a technique used to determine presence of target DNA or RNA by adding a synthetic strand that binds by complementary base pairing to the target.
Microbiology
In molecular diagnostic testing, hybridization employs complementary base pair binding of a synthetic strand to DNA or RNA.
In excess triglycerides, the triglycerides reduce the amount of cholesterol in LDL particles producing small dense LDL molecules. Because of size and density, these molecules more easily enter damaged endothelium and vessel walls and are more easily incorporated as plaque is formed.
Which statement best describes small dense LDL particles that can occur in atherogenic dyslipidemia?
The document designed to protect phlebotomists from contacting hepatitis is the:
In DNA complementary base pairing, guanine and cytosine pair and adenine and thymine base pair. Remembering the phrase "G-CAT" helps one recollect correct pairing.
Which nitrogen base would bind with a guanine nucleotide in forming double-stranded DNA?
