ASCP ASCP Certifications ASCP-MLT Questions & Answers

• Question 321:

  Atherosclerosis is a hardening of an artery specifically due to the build up of plaque. The risk to patients with significant atherosclerosis is that eventually a narrowing of the artery (stenosis) can cause a reduction in oxygen delivery to tissues and plaque rupture can lead to an acute coronary event.

  Atherosclerosis is a hardening of an artery specifically due to which of the following?

  A. Build up of plaque

  B. Aggregation of platelets

  C. Hypercalcemia

  Correct Answer: A

• Question 322:

  The colonies seen growing on the bird seed agar appear smooth and have a distinct reddish-brown pigmentation. The active ingredient in bird seed (Guizotia abyssinica) agar is caffeic acid, which is extracted and placed in an agar containing

  1% glucose. Of the cryptococci, and other species of yeasts, Cryptococcus neoformans selectively produces the enzyme phenoloxidase, which oxidizes the caffeic acid in the medium to melanin, producing the red-brown pigmentation.

  The other yeast species included in this exercise do not possess phenoloxidase activity and therefore remain non-pigmented when grown on bird seed agar.

  The colonies shown in this photograph were grown on Guizotia abyssinica (bird seed) agar at 30°C for 72 hours. The most likely identification is:

  

  A. Cryptococcus laurentii

  B. Cryptococcus neoformans

  C. Candida parapsilosis

  D. Saccharomyces cerevisiae

  Correct Answer: B

• Question 323:

  Which of the following is a selective media recommended for the isolation of Clostridium difficile?

  A. Cefoxitin-cycloserine-fructose agar (CCFA)

  B. Buffered-charcoal yeast extract(BCYE) agar

  C. Kanamycin Vancomycin laked blood (LKV) agar

  D. Thiosulphate citrate bile salts sucrose (TCBS) agar.

  Correct Answer: A

• Question 324:

  Charcot-Leyden crystals in stool are thought to be created from damaged eosinophil byproducts. These crystals have a strong association, although they are rare, with parasitic infections or allergic reactions. Charcot-Leyden crystals in stool may be associated with an immune response and are thought to be the breakdown products of:

  A. neutrophils

  B. eosinophils

  C. monocytes

  D. lymphocytes

  E. basophils

  Correct Answer: B

• Question 325:

  The correct set of patient data would be: Hgb A = 60%, Hgb S = 38%, Hgb A2 = 2%, Hgb F = 0%

  Patients with sickle cell trait commonly have Hgb A values between 40 and 60%, Hgb S values between 20 and 40% and Hgb A2 values between 2 and 3%.

  A known sickle cell trait patient has a hemoglobin electrophoresis test performed. Which of the following hemoglobin percentage sets would most closely match this patient's diagnostic state?

  A. Hgb A = 90%, Hgb S = 8%, Hgb A2 = 2%, Hgb F = 0%

  B. Hgb A = 60%, Hgb S = 38%, Hgb A2 = 2%, Hgb F = 0%

  C. Hgb A = 40%, Hgb S = 58%, Hgb A2 = 2%, Hgb F = 0%

  D. Hgb A = 25%, Hgb S = 70%, Hgb A2 = 2%, Hgb F = 3%

  Correct Answer: B

• Question 326:

  When an antigen comes in contact with the skin, the antigen is processed by cells in the epidermis and come in contact with T lymphocytes. T lymphocytes recognize the antigen as foreign and circulate through the bloodstream back to the epidermis and produce an inflammatory response to eliminate the antigen, but this immune response can produce a characteristic rash in the skin called contact dermititis.

  Contact dermatitis is mediated by:

  A. B lymphocytes

  B. Macrophages

  C. Polymorphonuclear cells

  D. T lymphocytes

  E. Chemokines

  Correct Answer: D

• Question 327:

  Pluripotential stem cells are ultimately capable of differentiating into all types of leukocytes.

  Hematology

  Pluripotential stem cells are capable of producing which of the following:

  A. Only T-lymphocyte and B-lymphocyte subsets

  B. Erythropoietin, thrombopoietin and leukopoietin

  C. Lymphoid and myeloid stem cells

  D. Daughter cells from only a single cell line

  Correct Answer: C

• Question 328:

  Primary- Target glands (such as thymus, thyroid, parathyroid, etc.) Secondary- Pituitary gland Tertiary- Hypothalamus Match the type of endocrine dysfunction with the appropriate organ:

  1.

  Target gland

  2.

  Pituitary gland

  3.

  Hypothalamus

  A. Secondary

  B. Primary

  C. Tertiary

  Correct Answer: ABC

• Question 329:

  Yellow/gray or orange stopper tubes contain thrombin. Question options:

  A. True

  B. False

  Correct Answer: A

• Question 330:

  Serum alkaline phosphatase is produced in the bone, intestine, and the placenta- but not in the brain. Serum alkaline phosphatase activity is derived from all of the following organs except:

  A. Bone

  B. Intestine

  C. Placenta

  D. Brain

  Correct Answer: D