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Questions and Answers
What triggers the vascular spasm during hemostasis?
What triggers the vascular spasm during hemostasis?
- Pain receptors activation (correct)
- Aggregation of platelets
- Chemicals released by endothelial cells
- Serotonin release
What is the first stage of hemostasis?
What is the first stage of hemostasis?
- Coagulation
- Serotonin release
- Aggregation of platelets
- Vasoconstriction (correct)
What is the function of platelet plug in hemostasis?
What is the function of platelet plug in hemostasis?
- Induce vasoconstriction
- Prevent bleeding and stop hemorrhage (correct)
- Activate coagulation factors
- Promote blood vessel dilation
What speeds up the formation and propagation of the platelet plug during hemostasis?
What speeds up the formation and propagation of the platelet plug during hemostasis?
What do activated platelets become adhesive to during hemostasis?
What do activated platelets become adhesive to during hemostasis?
Flashcards
Vascular Spasm Trigger
Vascular Spasm Trigger
Activation of pain receptors triggers vascular spasm.
First Stage of Hemostasis
First Stage of Hemostasis
Vasoconstriction is the initial response to reduce blood flow at the injury site.
Function of Platelet Plug
Function of Platelet Plug
Platelet plugs prevent bleeding and stop hemorrhaging by temporarily sealing the injured vessel.
Platelet Plug Acceleration
Platelet Plug Acceleration
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Platelet Adhesion
Platelet Adhesion
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Study Notes
Hemostasis Process
- Thromboxane A2 and epinephrine trigger vascular spasm during hemostasis
Stages of Hemostasis
- The first stage of hemostasis is vasoconstriction, which reduces blood flow to the injured area
Platelet Plug Function
- The platelet plug, also known as a platelet thrombus, physically seals the wound or injured blood vessel, preventing further blood loss
Platelet Plug Formation
- Thromboxane A2 and collagen exposed at the site of injury speed up the formation and propagation of the platelet plug during hemostasis
Platelet Adhesion
- Activated platelets become adhesive to collagen and von Willebrand factor, leading to platelet aggregation and plug formation
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