LabCE Practice Test #1 exam 2023 with complete solutions

The principle behind point-of-care devices to measure hematocrit is: correct answersCalculating the conductance of the blood sample and correcting for temperature, conductivity of the plasma, and size of the fluid segment What is the "activation unit" in the classical complement pathway? correct answersC4,C2,C3 Schistosoma japonicum correct answers Which of the following lipoproteins will form a creamy layer at the top of stored, non-fasting plasma specimens? correct answersChylomicrons When would we perform a Lui Freeze? correct answersin work ups for ABO hemolytic disease of the newborn (ABO antibodies) Macrophages containing purple/black inclusions would most closely correlate with the patient's medical history of being a heavy smoker for more than 20 years. What do these cells contain? correct answersThese cells contain hemosiderin and are also known as siderophages. this organism has been associated with septicemia, bronchopneumonia, osteomyelitis and other infections, particularly in intravenous drug users. Gram Positive Spores correct answersBacillus circulans Decreases in both Hb A and A2 and an increase in Hb F results from a deletion in both the delta and beta genes on chromosome 11, preventing the appropriate production of hemoglobins A2 and A respectively correct answersDelta-beta thalassemia minor