Hemostasis Flashcards
Blood clot dissolution.
Fibrinolysis
What are the 2 Major Parts of Physiologic Hemostatic System?
Cellular components and Plasma Proteins
What are the cellular components of Physiologic Hemostatic System?
Platelets, Endothelial cells (ECs), Neutrophils, Monocytes
Group of plasma proteins participates in _____, _____ and _____.
Clot formation (coagulation); Dissolution of clots (fibrinolysis); Naturally occurring serine proteas inhibitions (Anti- coagulant)
What happens during primary hemostatis? _____-> _____-> _____-> _____->.
Vasoconstriction → Platelet Adhesion → Platelet Aggregation → Platelet Secretion
Constriction or narrowing of the (lumen) diameter of blood vessel to decrease blood flow.
Vasoconstriction
The purpose is to decrease the blood flow especially when a blood vessel is injured to prevent continuous bleeding.
Vasoconstriction
During vasoconstriction, collagen (sub-endothelial collagen) residing in the connective tissue will _______.
activate platelets
Bring deoxygenated blood from body tissues to heart.
Veins
Where the gas exchange happen, when venous and arterial blood components are found.
Capillaries
Brings oxygenated blood from heart to body tissues.
Arteries
Outermost layer of blood vessels.
Vascular Adventitia
Middle layer of blood vessel.
Vascular Media
Inner layer of blood vessel.
Vascular Intima
Made up of simple squamous epithelium cells which are involved in clotting process by producing and storing clotting component.
endothelial cells (endothelium)
Produces majority of the collagen.
Fibroblast
Regulates the permeability of the inner vessel wall.
Connective tissue Matrix
Highly active metabolically; involved in the clotting process by producing or storing clotting components.
Endothelium
Upon vessel injury, endothelium will release ______ and once healed, it will release _______.
prothrombotic components; antithrombotic or fibrinolytic component
The platelet will stick/bind to the endothelial cells.
Platelet adhesion
True/ false. Platelet adhesion is a reversible process.
True
Platelet bind to a non-platelet surfaces (sub-endothelial collagen).
Platelet adhesion
Promotes platelet adhesion and Binds to platelet via platelet glycoprotein receptor (GP Ib/IX/V).
VWF
Important components in Platelet adhesion are ____ and ____.
VWF and Glycoprotein membrane
VWF is absent or defective; Bleeding tendencies/risk.
VWF Disease
True/ False. Platelet Aggregation is irreversible.
True
The platelet will stick/bind to other platelets.
Platelet Aggregation
Important components in Platelet aggregation are ____, ______ and _______.
GP IIb/IIIa receptor, fibrinogen and calcium
When platelets are activated, a change in _____ allows binding of fibrinogen as well as VWF and fibronectin which results in ______.
GP IIb/IIIa receptor; PLATELET CLUMPING
Fibrinogen is one of the coagulation factor known as _____.
FACTOR I
____act as glue for GP IIb/IIa receptors but with the presence or help of calcium.
Fibrinogen
Binds to GP IIb/IIIa receptors on adjacent platelet and joins them together in the presence of Ionized/Activated calcium (Ca2+).
Fibrinogen
____is also one of the coagulation factor also known as FACTOR IV but preferred to be called by its chemical name.
Calcium
Absence of GP IIb/IIIa platelet membrane receptor that is a problem with the aggregation process.
Glanzmann thrombasthenia
Lack of fibrinogen.
Afibrogenemia
Low levels of normal fibrinogen (functional but decrease in concentration.
Hypofibrogenemia