CLS FINAL EXAM LATEST 2024 ACTUAL EXAM 180
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
The process
... [Show More] of stopping the loss of blood from the blood
vessels:
a) is an uncomplicated process
b) involves interrelated and interdependent systems
c) is called fibrinolysis
d) is independent of any action by the vessels -
...ANSWER...b
All of the following are true of platelets EXCEPT:
a) circulating platelets have a round disklike shape
b) contact with collagen initiates a shape change
c) a platelet plug forms in seconds to stop bleeding in a
small wound
d) platelet aggregation requires only that spiny pseudopods
are present on the platelets - ...ANSWER...d
Which of the following is initiated by damage to a blood
vessel?
a) vasoconstriction
b) coagulation
c) fibrinolysis
d) all of the above - ...ANSWER...d
All of the following are true of the coagulation factors
EXCEPT:
a) they are numbered in the order they were discovered
b) VIII:C is called the antihemophilic factor (AHF)
c) they are produced in the liver and circulate in the
activated form
d) the mineral calcium was formerly named factor IV -
...ANSWER...c
Which of the following is not true of the PT test?
a) coagulation screening test
b) measures intrinsic pathway
c) monitors oral anticoagulant therapy
d) reference value of 11-13 seconds - ...ANSWER...b
Which of the following will have no effect on the
prothrombin time?
a) severe vitamin K deficiency
b) liver disease
c) factor VIII deficiency
d) factor II dificiency - ...ANSWER...c
Which of the following cannot be used to perform a
prothrombin time test?
a) plasma
b) citrated whole blood
c)capillary puncture blood
d) serum - ...ANSWER...d
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
Which of the following is true regarding identification of
WBCs?
a) the size can be estimated by comparing them to epithelial
cells
b) abnormal cells are easy to identify
c) most normal WBCs can be easily identified
d) the shape of the nuclei is not considered - ...ANSWER...c
Which of the following is true of RBCs?
a) they are biconcave disks
b) in the peripheral blood, they have a nucleus
c) they are about 2-3 um in diameter
d) mature cells take up the basophilic stain - ...ANSWER...a
All of the following are true of RBCs EXCEPT:
a) their color is due to hemoglobin
b) normal mature RBCs stain pink-tan
c) the central area stains darker than the edge
d) their diameter is 6-8 micrometers - ...ANSWER...c
Which of the following is not a reference range for
differential count on an adult?
a) 25%-40% lymphocytes
b) 3%-9% neutrophils
c) 0%-7% bands
d) 1%-3% eosinophils - ...ANSWER...b
In the WBC differential count:
a) an average of 7-20 platelets/oil immersion field is
considered normal
b) a 1 month old infant will have 45%-50% neutrophils
c) 45%-50% neutrophils is normal for an adult
d) 7%-13% bands is normal for an adult - ...ANSWER...a
Which of the following statements about the WBC
differential count is not correct?
a) viral infections usually cause increased lymphocytes and
increased total WBCs
b) neutrophils and bands can be inreased in bacterial
infections
c) infectious mono causes increased total WBCs -
...ANSWER...a
Which of the following is true?
a) lymphocytes often have vacuoles in their cytoplasm
b) lymphocytes are derived from a common perfursor called
the promyelocyte
c) lymphocytes are produced in the bond marrow and other
lymphoid tissue
d) monocytes are involved in the immune response by
producing antibodies - ...ANSWER...c
Which of the following is not correct concerning the normal [Show Less]