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NEW QUESTION 50
The body of a tapeworm is composed of successive segments known as proglottids. Each mature proglottid has both male and female reproductive structures.
What is the anatomical feature of a tapeworm that possesses both male and female reproductive structures?
- A. Rostellum
- B. Scolex
- C. Brood capsule
- D. Proglottid
Answer: D
NEW QUESTION 51
CD34, a cell surface marker, presents on undifferentiated pluripotential hemopoietic stem cells. CD34 is a cell surface glycoprotein and functions as a cell-cell adhesion factor.
Which one of the following antigen markers is BEST associated with stem cells?
- A. CD3
- B. CD10
- C. CD18
- D. CDC007
- E. CD34
Answer: E
NEW QUESTION 52
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. Recognized as non-self
- B. A linear molecule
- C. Less than 5,000 molecular weight
- D. A haptene
- E. A lipid
Answer: A
NEW QUESTION 53
Alkaline phosphatase, or ALP, is present in kidneys, liver, intestines, bone, and the placenta. The liver makes the largest amount of ALP. Some of the conditions associated with increased levels of ALP include: damaged liver cells, rapid bone growth (during puberty), bone diseases, or a disease that affects how much calcium is in the blood (hyperparathyroidism), and vitamin D deficiency.
Chemistry
Isoenzymes of alkaline phosphatase occur in:
- A. Liver, brain, spleen, intestines
- B. Kidney, bone, intestines, liver
- C. Brain, kidney, intestines, bone
- D. Bone, brain, liver, pancreas
Answer: B
NEW QUESTION 54
Howell-Jolly bodies are composed of DNA and appear as small round ball-like inclusions inside the red cells.
Usually only one Howell-Jolly body will be present in each red cell.
Single erythrocyte inclusions which are large, round, smooth and purplish-blue staining are most likely:
- A. Cabot rings
- B. Howell-Jolly bodies
- C. Heinz bodies
- D. Basophilic stippling
Answer: B
NEW QUESTION 55
The combination of complement C4, C2 and C3 that binds to the antigen-antibody complex in the initial reaction step in the classical pathway of complement activation is called the activation unit.
Which of the following is the "activation unit" in the classical complement pathway?
- A. C4, C2, C3
- B. C1, C2, C9
- C. C2
- D. C1
- E. C5, C6, C7, C8, C9
Answer: A
NEW QUESTION 56
Which of the following testing options would be classified as waived testing by CLIA standards?
- A. Complete blood count (CBC)
- B. PCR testing
- C. Microscopic examination for the presence of bacteria
- D. Blood glucose for home use
Answer: D
NEW QUESTION 57
The type of isolation category that always requires a HEPA mask or respirator to be worn is:
- A. droplet
- B. airborne
- C. blood and body fluid
- D. contact
Answer: B
NEW QUESTION 58
This scenario's answer can be calculated by first deciding what the total quality control labor costs are as well as what the total consumable costs are. In this case, if quality control is run 3 times per day, a total of 1095 quality control runs are performed each year. The direct labor cost of $2.63 multiplied by 1095 quality control runs equals $2879.85 per year in quality control direct labor. The hospital pays $354.00 per month on quality control consumables, which equals $4248.00 per year. The total quality control costs in a year are equal to
$2879.85 + $4248.00 = $7127.85. If 76,000 new chemistry tests panels are peformed each year, the total quality control cost per new chemistry test panel will be $0.09.
General Hospital is considering the addition of a new chemistry panel containing 12 tests. The laboratory is asked to calculate the total cost of quality control per new chemistry test panel. Quality control must be performed 3 times per day (every 8 hours). The labor cost per quality control test for this panel is $2.63. A month's worth of quality control reagent costs $354.00. What is the total quality control cost per new chemistry test panel if 76,000 of these new panels are performed each year?
- A. $0.01
- B. $0.09
- C. $0.04
- D. $1.70
Answer: B
NEW QUESTION 59
A clinical laboratory scientist or medical laboratory scientist (or medical technologist in older terminology) may serve as all of the following except:
- A. laboratory manager.
- B. pathologist.
- C. educator.
- D. section supervisor.
Answer: B
NEW QUESTION 60
What additional fraction would be seen if plasma rather than serum was subjected to electrophoresis:
- A. Fibrinogen
- B. Alpha-1 antitrypsin
- C. Alpha-2 macroglobulin
- D. Gamma globulins
Answer: D
NEW QUESTION 61
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. Daughter cells from only a single cell line
- B. Lymphoid and myeloid stem cells
- C. Only T-lymphocyte and B-lymphocyte subsets
- D. Erythropoietin, thrombopoietin and leukopoietin
Answer: B
NEW QUESTION 62
Name the comprehensive written safety plan detailing the proper use and storage of hazardous chemicals in the workplace.
- A. SOP
- B. OSHA
- C. MSDS
- D. chemical hygiene plan
Answer: D
NEW QUESTION 63
Small, dense LDL is most likely to interact with arterial walls, leading to deposition of cholesterol, and initiating or worsening atherosclerosis. Small, dense LDL is associated with more than a three-fold increase in the risk of coronary heart disease.
Large, buoyant LDL is less atherogenic than small, dense LDL.
The LDL phenotype A is normal. It is the so called 'B' pattern that is associated with increased risk.
Which of the following is most likely to interact with arterial walls, leading to deposition of cholesterol, and initiating or worsening atherosclerosis?
- A. Small dense LDL
- B. LDL phenotype 'A'
- C. Large buoyant LDL
Answer: A
NEW QUESTION 64
In sickle cell anemia, rapid hemoglobin turnover may be present. HbA1C and other glycated hemoglobin assays are not valid in rapid hemoglobin turnover and in abnormal hemoglobin conditions. Fructosamine measurements can be used because of shorter half life of albumin.
HbA1C measurements are NOT ordinarily used to monitor long-term diabetic control in a diabetic with sickle cell anemia.
- A. false
- B. true
Answer: B
NEW QUESTION 65
When making a platelet concentrate, the proper procedure is to start with a low centrifugation of the whole blood bag. After the plasma is removed, it is centrifuged again at a higher speed to separate the platelet portion from the plasma portion.
Blood bank
The following steps must be followed in preparation of a platelet concentrate:
- A. Whole blood centrifuged at high speed - plasma separated then centrifuged at high speed
- B. Whole blood centrifuged at low speed - plasma separated then centrifuged at high speed
- C. Whole blood centrifuged at low speed - plasma separated then centrifuged at low speed
- D. Whole blood centrifuged at high speed - plasma separated then centrifuged at low speed
Answer: B
NEW QUESTION 66
The division of Department of Health and Human Services (DHHS) responsible for protecting public health by ensuring the safety and efficacy of foods, drugs, biological products, medical devices, and cosmetics is:
- A. Clinical and Laboratory Standards Institute (CLSI)
- B. Health Insurance Portability and Accountability Act (HIPPA)
- C. Food and Drug Administration (FDA)
- D. the Joint Commission
Answer: C
NEW QUESTION 67
May-Hegglin anomaly is a rare autosomal dominant condition in which patients are at risk for bleeding and infections. It is characterized by the presence of large Dohle body like inclusions within neutrophils, eosinophils, basophils, and monocytes.
The WBC anomaly indicated by the arrow in this illustration is:
- A. May-Hegglin anomaly
- B. Alder-Reilly anomaly
- C. Pelger-Huet anomaly
- D. Toxic granulation
Answer: A
NEW QUESTION 68
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