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 followingaretrue of blood vessels EXCEPT:
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a) Arteriesarethick-walled, thestrongest typeofblood vessel
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b) Veinscarrydeoxygenatedblood e e e




c) Thereareabout 10,000 miles ofblood vessels inan adult
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d) Capillariesarethe smallest blood vessels -CORRECTANSWER C e e e e e e e e e




Incardiopulmonarycirculation:
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a) blood is carriedfrom the heart tothe tissues
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b) bloodcirculates from the heart to thelungs to the tissues
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c) bloodcirculatesfromthehearttothelungswhereO2ispickedupbythebloodandCO2is released
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d) blood is carriedfrom the heart to the tissues and back to theheart, providingO2 to the tissues
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-CORRECTANSWER C
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Allof the followingstatements are trueof blood EXCEPT:
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a) it makes up 10%-15% of total bodyweight
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b) adultblood volumeis approximately5 liters
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c) itiscomposed offormed elements suspended in a fluid called plasma
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d) about50%-60%of blood volumeis plasma - CORRECTANSWERA
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"Thick-walled,elastic,and muscular"describes which typeofblood vessel?
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a) capillaries

,b) arteries

c) veins

d) venules-CORRECTANSWER B e e e e




Whichofthe followingaretrueofhemacytometer and cover glass EXCEPT:
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a) TheymustmeetNational InstituteofStandardsandTechnolody(NIST) standards.
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b) Ifa certified hemacytometer is used,anycoverglass can be used.
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c) Theymust be disinfected afteruse.
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d) Theyshould be gentlywashed and dried to avoid scratches -CORRECTANSWER B
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Whichofthe followingfunctions is carriedout by blood?
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a) Itdelivers nutrients and CO2 to thetissues
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b) Itregulatesbodytemperature
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c) Itdelivers O2 to the lungs and tissures.
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d) Noneof the above e e e




e) All of the above - CORRECTANSWER B
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Whichofthe following statements is true of thehemacytometer?
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a) Whenviewed from the top, it has two polishedraised platforms
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b) Thedepressions surroundingthe platforms arecalled ditches
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c) Thedepressions surrounding the platforms form the letter I
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d) All of the above
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E) Noneof the above - CORRECTANSWERA e e e e e e e




Whichofthe following statements is true of hemacytometers?
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a) thecover glass coversoneside at a time
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b) thecover glass regulates the depthof the fluid
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, c) thechamberdepth in the Neubauer countingchamers is 1 mm
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d) eachof thenine largesquares is 3x3 mm e e e e e e e e




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




Whichofthe followingcan be counted usingthe hemacytometer?
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a) Peripheralbloodcells e e




b) spermfor fertilitytests e e e




c) cellsin cerebrospinal fluid e e e




d) allof theabove- CORRECTANSWER d
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Whichofthe followingis true of thehemacytometer?
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a) intheUnopetteWBC method, thefourlargecorner squares arecounted
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b) thelargecentersquareused for theRBC count is subdivided into 20smallersquares
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c) plateletsand RBCs areboth counted usingthewhole largecenter square e e e e e e e e e e e




d) onecornersquarehas an area of 1mm squared -CORRECTANSWER a
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Allof the followingaretrueof RBC andWBC counts EXCEPT:
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a) Manyareperformed when blood counts aredecreased due to chemotherapy
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b) Theycan beperformed on automated instruments e e e e e e




c) Themajorityareperfromed manually
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d) Manyareperformed byinstruments that use alaser beam -CORRECTANSWER ce e e e e e e e e e e e e




Whichofthe followingis true of manual cells counts?
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a) theycan beperformed when blood counts are decreased due to chemotherapy
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b) theyaremoreaccurate than automated counts
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c) theycannot be used to monitor apatient's progress
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d) theRbC andWBC cannot be performed separately -CORRECTANSWER a
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