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Exam study book Clinical Laboratory Science of Mary Louise Turgeon - ISBN: 9780323829342 (CLS EXAM)
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CLS EXAM LATEST 2024 ACTUAL EXAM 180 QUESTIONSAND CORRECT DETAILED ANSWERS WITH RATIONALES
(VERIFIED ANSWERS) |ALREADY GRADED A+
All of the following are true of blood vessels EXCEPT:
a) Arteries are thick-walled, the strongest type of blood vessel
b) Veins carry deoxygenated blood
c) There are about 10,000 miles of blood vessels in an adult
d) Capillaries are the smallest blood vessels - ANSWER: C
In cardiopulmonary circulation:
a) blood is carried from the heart to the tissues
b) blood circulates from the heart to the lungs to the tissues
c) blood circulates from the heart to the lungs where O2 is picked up by the blood
and CO2 is released
d) blood is carried from the heart to the tissues and back to the heart, providing O2
to the tissues - ANSWER: C
All of the following statements are true of blood EXCEPT:
a) it makes up 10%-15% of total body weight
b) adult blood volume is approximately 5 liters
c) it is composed of formed elements suspended in a fluid called plasma
d) about 50%-60% of blood volume is plasma - ANSWER: A
"Thick-walled, elastic, and muscular" describes which type of blood vessel?
a) capillaries
b) arteries
c) veins
d) venules - ANSWER: B
Which of the following are true of hemacytometer and cover glass EXCEPT:
a) They must meet National Institute of Standards and Technolody (NIST) standards.
b) If a certified hemacytometer is used, any cover glass can be used.
c) They must be disinfected after use.
d) They should be gently washed and dried to avoid scratches - ANSWER: B
Which of the following functions is carried out by blood?
a) It delivers nutrients and CO2 to the tissues
b) It regulates body temperature
c) It delivers O2 to the lungs and tissures.
d) None of the above
e) All of the above - ANSWER: B
Which of the following statements is true of the hemacytometer?
a) When viewed from the top, it has two polished raised platforms
b) The depressions surrounding the platforms are called ditches
,c) The depressions surrounding the platforms form the letter I
d) All of the above
E) None of the above - ANSWER: A
Which of the following statements is true of hemacytometers?
a) the cover glass covers one side at a time
b) the cover glass regulates the depth of the fluid
c) the chamber depth in the Neubauer counting chamers is 1 mm
d) each of the nine large squares is 3x3 mm
e) none of the above - ANSWER: B
Which of the following can be counted using the hemacytometer?
a) Peripheral blood cells
b) sperm for fertility tests
c) cells in cerebrospinal fluid
d) all of the above - ANSWER: d
Which of the following is true of the hemacytometer?
a) in the Unopette WBC method, the four large corner squares are counted
b) the large center square used for the RBC count is subdivided into 20 smaller
squares
c) platelets and RBCs are both counted using the whole large center square
d) one corner square has an area of 1mm squared - ANSWER: a
All of the following are true of RBC and WBC counts EXCEPT:
a) Many are performed when blood counts are decreased due to chemotherapy
b) They can be performed on automated instruments
c) The majority are perfromed manually
d) Many are performed by instruments that use a laser beam - ANSWER: c
Which of the following is true of manual cells counts?
a) they can be performed when blood counts are decreased due to chemotherapy
b) they are more accurate than automated counts
c) they cannot be used to monitor a patient's progress
d) the RbC and WBC cannot be performed separately - ANSWER: a
Which of the following is true regarding the WBC count reference ranges?
a) in conventional units, the range for adult females is 4-5.5x10 to the sixth
microliters
b) in SI units, the range for the adult male is 4-5.5x10 to the sixth microliters
c) in SI units, the reference range for an adult is 4-11x10 to the ninth microliters
d) for an adult, the reference range is 9-30x10 to the ninth mircoliters - ANSWER: c
All of the following are pathological causes of leukocytosis EXCEPT:
a) infection
b) obstetric labor
c) leukemias
, d) polycythemia - ANSWER: b
All of the following are true of blood collected for blood smears EXCEPT:
a) the preferred specimen is capillary blood
b) anticoagulant must always be used in blood for blood smears
c) venous blood with EDTA can be used
d) capillary blood can be collected into capillary tubes - ANSWER: b
Which of the following is correct concerning quality assessment when preparing a
blood smear?
a) the procedure should produce minimal alteration of cell distribution and
morphology
b) venous anticoagulated blood must be well mixed before making a smear
c) the only anticoagulant that can be used for smears is EDTA
d) all of the above - ANSWER: d
Which of the following is not true when making blood smears?
a) smears must be stained before they air-dry
b) smears from anticoagulated venous blood should be made within 2 hours of blood
collection
c) smears should have a feathered edge
d) capillary blood is preferred over venous blood - ANSWER: a
When preparing slides by the two-slide method, which is true?
a) a large drop of blood makes the best smear
b) the spreader slide can be used to prepare several smears.
c) the smear should cover one-half to three-fourths of the slide
d) smears with holes and ridges are acceptable - ANSWER: c
Which of the following is true regarding the preparation and staining of a blood
smear?
a) smears must be stained immediately
b) smears can be immersed in methanol and stained later
c) smears can be preserved by immersing in ethanol
d) Wright's stain contains no preservative - ANSWER: b
All of the following are formed elements found in normal blood EXCEPT:
a) RBCs (erythrocytes)
b) WBCs (leukocytes)
c) megakaryocytes
d) platelets - ANSWER: c
Which of the following cellular features are examined to identify a cell?
a) relative cell size
b) nuclear characteristics
c) cytoplasmic characteristics
d) all of the above - ANSWER: d
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