QUESTIONS AND CORRECT DETAILED ANSWERS WITH
RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+
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180 real exam-based questions with verified correct answers.
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Latest 2025–2026 edition, aligned with CLS exam updates.
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The process 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
, Humoral immunity is brought about primarily by:
a) T cells
b) lymphokines
c) antibodies
d) all of the above
e) none of the above - answer-c
The antibody class that is predominant in secretions is:
a) IgG
b) IgM
c) IgA
d) IgD
e) IgE - answer-c
The class of antibody produced first after exposure to antigen is: a)
IgG
b) IgM
c) IgA
d) IgE
e) IgD - answer-b
Specific immunity is characterized by all of the following EXCEPT:
a) specificity
b) inflammation
c) recognition
d) memory - answer-b
All of the following are characterisitcs of the inflammatory response EXCEPT:
a) phagocytic action of neutrophils