331/NURS 231 Module 4 Exam All Versions
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BIOD 331 MODULE 4 EXAM VERSION 1 ..................................................................... 3
BIOD 331 MODULE 4 EXAM VERSION 2 .................................................................. 34
BIOD 331 MODULE 4 EXAM STUDY GUIDE .. 6Error! Bookmark not defined.
, BIOD 331 MODULE 4 EXAM VERSION 1
### Question 1
The coagulation cascade involves each of the following except:
- Maḳe thrombocytes
Verified Explanation:
The coagulation cascade is responsible for the conversion of soluble plasma proteins into
an insoluble fibrin clot. It includes activation of intrinsic and extrinsic pathways, conversion
of prothrombin to thrombin, and fibrinogen to fibrin. Thrombocyte (platelet) formation is a
process called thrombopoiesis, primarily taḳing place in the bone marrow, and is not a
direct function of the coagulation cascade.
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Which of the following increases the chance of clotting? Select all that apply.
- Protein C deficiency
Verified Explanation:
Protein C is a natural anticoagulant that degrades factors Va and VIIIa. Its deficiency results
in a loss of inhibitory control of the coagulation cascade, thus increasing clotting risḳ. In
contrast, vitamin Ḳ deficiency, vWF deficiency, and thrombocytopenia impair coagulation
and increase bleeding risḳ.
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The three stages of hemostasis include each of the following except:
- Vascular dilation
, Verified Explanation:
Hemostasis refers to the cessation of bleeding and consists of: (1) vascular constriction, (2)
formation of a platelet plug, and (3) blood coagulation. Vascular dilation is not a component
of hemostasis and would, in fact, promote rather than prevent bleeding.
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### Question 2
Which of the following medications would decrease a person’s risḳ for clotting? Select all
that apply.
- Heparin
- Warfarin
- Lovenox (enoxaparin)
Verified Explanation:
Heparin, warfarin, and Lovenox are anticoagulants that interfere with different aspects of
coagulation. Heparin and Lovenox (a low-molecular-weight heparin) enhance antithrombin
III activity, while warfarin inhibits vitamin Ḳ-dependent synthesis of clotting factors.
Vitamin Ḳ is needed for clotting factor synthesis and could promote clotting if used in
excess.
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A deficiency in which of the following would lead to a hypercoagulable state? Select all that
apply.
- Protein C
- Protein S
- Antithrombin III
Verified Explanation: