CLS FINAL EXAM | CONTAINS VERIFIED QUESTIONS AND ANSWERS WITH DETAILED RATIONALES| UPDATED 2025 | VERIFIED AND GUARANTEED PASS

CLS FINAL EXAM | CONTAINS VERIFIED QUESTIONS
AND ANSWERS WITH DETAILED RATIONALES|
UPDATED 2025 | VERIFIED AND GUARANTEED PASS



All of the followingare true of blood vessels EXCEPT:
x x x x x x x x x




a) Arteries arethick-walled, the strongest type of blood vessel
x x x x x x x x




b) Veinscarrydeoxygenatedblood x x x




c) Thereareabout 10,000 miles of blood vessels in an adult
x x x x x x x x x x




d) Capillariesarethe smallest blood vessels -CORRECTANSWER C x x x x x x x x x




In cardiopulmonarycirculation:
x x




a) blood is carriedfrom the heart tothe tissues
x x x x x x x x




b) blood circulates from the heart to the lungs to the tissues
x x x x x x x x x x




c) blood circulates from thehearttothelungswhereO2 ispickedup bythe bloodandCO2 is released
x x x x x x x x x x x x x x x x x x x




d) blood is carried from the heart to the tissues and back to theheart, providingO2 to the tissues
x x x x x x x x x x x x x x x x x x




- CORRECTANSWER C
x x x




All of the followingstatements are trueof blood EXCEPT:
x x x x x x x x x




a) it makes up 10%-15% of total bodyweight
x x x x x x x




b) adult blood volumeis approximately5 liters
x x x x x x




c) it iscomposed of formed elements suspended in a fluid called plasma
x x x x x x x x x x x




d) about 50%-60%of blood volume is plasma - CORRECTANSWERA
x x x x x x x x x x




"Thick-walled,elastic, and muscular" describes which type of blood vessel?
x x x x x x x x x




a) capillaries

,b) arteries

c) veins

d) venules -CORRECTANSWER B x x x x




Whichof the following aretrueof hemacytometer and cover glass EXCEPT:
x x x x x x x x x x x




a) Theymust meetNational InstituteofStandards andTechnolody(NIST) standards.
x x x x x x x x x x




b) If a certified hemacytometer is used,anycover glass can be used.
x x x x x x x x x x x




c) Theymust be disinfected after use.
x x x x x




d) Theyshould be gentlywashed and dried to avoid scratches -CORRECTANSWER B
x x x x x x x x x x x x x




Whichof the following functions is carried out by blood?
x x x x x x x x x




a) It delivers nutrients and CO2 to the tissues
x x x x x x x




b) It regulates bodytemperature
x x x




c) It delivers O2 to the lungs and tissures.
x x x x x x x




d) None of the above x x x




e) All of the above - CORRECTANSWER B
x x x x x x x




Whichof the following statements is true of the hemacytometer?
x x x x x x x x x




a) Whenviewed from the top, it has two polished raised platforms
x x x x x x x x x x




b) Thedepressions surroundingthe platforms are called ditches
x x x x x x x




c) The depressions surrounding the platforms form the letter I
x x x x x x x x




d) All of the above
x x x




E) Noneof the above - CORRECTANSWERA x x x x x x x




Whichof the following statements is true of hemacytometers?
x x x x x x x x




a) the cover glass coversone side at a time
x x x x x x x x




b) the cover glass regulates the depth of the fluid
x x x x x x x x

, c) thechamber depth in the Neubauer countingchamers is 1 mm
x x x x x x x x x x




d) eachof thenine large squares is 3x3 mm x x x x x x x x




e) noneof the above - CORRECTANSWER B x x x x x x x




Whichof the followingcan be counted usingthe hemacytometer?
x x x x x x x x x




a) Peripheralblood cells x x




b) sperm for fertilitytests x x x




c) cellsin cerebrospinal fluid x x x




d) allof theabove- CORRECTANSWER d
x x x x x x x




Which of the followingis true of thehemacytometer?
x x x x x x x x




a) inthe UnopetteWBC method, thefour largecorner squares are counted
x x x x x x x x x x x




b) thelarge centersquare used for theRBC count is subdivided into 20smallersquares
x x x x x x x x x x x x x x




c) plateletsand RBCs areboth counted using thewhole large center square x x x x x x x x x x x




d) one corner squarehas an area of 1mm squared - CORRECTANSWER a
x x x x x x x x x x x x




All of the followingaretrue of RBC andWBC counts EXCEPT:
x x x x x x x x x x x




a) Manyareperformed when blood counts are decreased due to chemotherapy
x x x x x x x x x x




b) Theycan be performed on automated instruments x x x x x x




c) The majority are perfromed manually
x x x x




d) Many are performed byinstruments that use alaser beam -CORRECTANSWER c
x x x x x x x x x x x x x




Which of the following is trueof manual cells counts?
x x x x x x x x x




a) theycan beperformed when blood counts are decreased due to chemotherapy
x x x x x x x x x x x




b) theyare moreaccurate than automated counts
x x x x x x




c) theycannot beused to monitor a patient's progress
x x x x x x x x




d) theRbC andWBC cannot be performed separately -CORRECTANSWER a
x x x x x x x x x x x