ASCP ASCP Certifications ASCP-MLT Questions & Answers

• Question 521:

  Troponin is potentially more specific for myocardial damage than CK-MB and stays elevated longer. It may eventually replace CK-MB as the standard marker of myocardial damage. In addition, troponin T has been known to be elevated in the setting of even mild degrees of renal failure. Troponin and CK-MB both tend to rise approximately 3 hours after a MI (hence why the correct answer is "A", since it is false); however, troponins can stay elevated up to 2 weeks as CK-MB tends to return to baseline around 36 hours.

  Chemistry

  Which of the following statements is FALSE regarding troponin?

  A. It rises much sooner after an MI than CK-MB

  B. It stays positive much longer than CK-MB

  C. It is potentially more specific than CK-MB

  D. Troponin T is often elevated in renal failure patients

  Correct Answer: A

• Question 522:

  The renal threshold is the maximum amount of a substance that the kidney can prevent from entering into the urine.

  UA and body fluids

  The renal threshold is best described as:

  A. Concentration at which a substance in the blood spills into urine

  B. Concentration at which reabsorption first occurs

  C. Concentration at which kidney can no longer filter the blood

  D. Concentration at which kidney failure begins

  Correct Answer: A

• Question 523:

  A hapten is an incomplete antigen.

  All of the following cellular antigens are important to an immunohematologist except:

  A. Blood group antigens

  B. Histocompatibility antigens

  C. Haptens

  D. Autoantigens

  Correct Answer: C

• Question 524:

  The clue to the identification of the colony seen in the upper frame is the gram stain in the lower frame, in which are seen short, rounded, gram positive bacilli, many of which possess distinct spores. As the colonies grew aerobically, the presence of spores indicates Bacillus species. The colonies are spreading, smooth, yellow-white and non-hemolytic. The lack of hemolysis and the small size of the bacterial cells suggests a species other than Bacillus cereus, the species causing most human infections. The isolate was identified as Bacillus circulans, which is consistent with the gram stain morphology. Clostridium septicum also produces spores; however, this species is an anaerobe and would grow poorly if at all and not produce spores aerobically. Listeria monocytogenes and Lactobacillus species are gram positive bacilli; however, neither of these produce spores.

  The colonies seen in the upper frame, grown after 48 hours incubation aerobically at 35°C, and the accompanying gram stain in the lower frame are uncommonly associated with human disease, but have been associated with septicemia, bronchopneumonia, osteomyelitis and other infections, particularly in intravenous drug users. The most likely identification is:

  

  A. Clostridium septicum

  B. Bacillus circulans

  C. Listeria monocytogenes

  D. Lactobacillus species

  Correct Answer: B

• Question 525:

  Only non-self antigens can be immunogenic. Self antigens are normally recognized by the immune system as part of the host, so an immune response does not normally occur. Non- self antigens are immunogenic since they have the potential to cause an immune response.

  For a substance to be immunogenic it must be:

  A. A linear molecule

  B. A lipid

  C. Less than 5,000 molecular weight

  D. Recognized as non-self

  E. A haptene

  Correct Answer: D

• Question 526:

  Match each of the descriptions with the appropriate magnification:

  1.

  Color, Rouleau, Overall Slide Quality, Cell Distribution

  2.

  Platelet estimates RBC-platelet-WBC morphology WBC differential RBC inclusions

  3.

  Select area to examine, WBC estimate

  A. 40X (Dry)

  B. 10X

  C. 100X (Oil)

  Correct Answer: ABC

• Question 527:

  Microcontainer collection order of draw differs from regular peripheral blood collection order of draw. When performing a capillary draw, the lavender top container is obtained first. This decreases the possibility of clots in the container which would invalidate the results of the complete blood count test.

  After the lavender is drawn, other containers with anticoagulants would be collected, and containers without anticoagulants would be collected last.

  A phlebotomist must perform a skin puncture to obtain capillary specimens for a complete blood count (CBC), a plasma-based chemistry test, and a serum-based immunology test. The microcollection containers that will be used are lavender top containing EDTA anticoagulant, green top containing heparin anticoagulant, and gold top containing no anticoagulant. Which microcollection container should be collected first?

  A. Lavender top

  B. Green top

  C. Gold top

  D. The order of draw is not important.

  Correct Answer: A

• Question 528:

  Serum amylase and lipase levels may be slightly elevated in chronic pancreatitis, but not diagnostic enough to predict chronic pancreatitis; wheras high levels are found only during acute pancreatitis episodes. In the later stages of chronic pancreatitis, normal to decreased levels of amylase and lipase are caused by the gradual inability of the pancreas to secrete the enzyme

  All of the statements below regarding amylase and lipase in pancreatitis are TRUE EXCEPT:

  A. Amylase and lipase are as predictive in chronic as in acute pancreatitis.

  B. Diagnosis sensitivity is increased by assaying both amylase and lipase.

  C. Urinary amylase: creatinine ratio is the most sensitive test for acute pancreatitis.

  D. Serum lipase peaks at 24 hours after an episode of acute pancreatitis and remains high for 7-8 days.s.

  Correct Answer: A

• Question 529:

  Dce is found in 4% of whites and 44% of blacks.

  DCe is found in 42% of whites and 17% of blacks.

  DcE is found in 14% of whites and 11% of blacks.

  dce is found in 37% of whites and 26% of blacks.

  Blood bank

  The most common Rh haplotype among whites is:

  A. Dce

  B. DCe

  C. DcE

  D. dce

  Correct Answer: B

• Question 530:

  The red blood cell distribution width (RDW) increases as the severity of alpha thalassemia increases because of changing MCV as the bone marrow produces smaller cells. In addition, if Hemoglobin H bodies are present, they result in the formation of schiztocytes (RBC fragments) that can have an effect on the MCV and RDW.

  The Red cell Distribution Width (RDW) in alpha thalassemia is

  A. within normal limits

  B. usually increased

  C. usually decreased

  D. dependent upon severity

  Correct Answer: D