Blood clotting Flashcards

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1
Q

what is the blood clotting cascade process

A

thromboplastin + calcium and vitamin k in plasma

prothrombin (soluble protein) – thrombin (enzyme)

fibrinogen – fibrin (insoluble)

fibrin mesh (insoluble)

platelets + red blood cells are trapped in mesh

CLOT

(all steps need to happen in order otherwise clot will not form)

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2
Q

more detail of blood clotting cascade (how it begins and where enzymes come from)

A

damage to endothelium exposes collagen
platelets stick to exposed collagen and each other to form a temporary platelet plug
enzyme thromboplastin is release from platelets and damaged tissue
thromboplastin in the presence of calcium and vitamin k converts prothrombin into thrombin (enzyme)
thrombin converts fibrinogen into fibrin
creates an insoluble mesh which catches red blood cells and platelets
forms a clot

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3
Q

which artery if blocked can cause a heart attack

A

coronary artery

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4
Q

what effect do blood clots have on blood flow

A

decrease blood flow
decrease amount of oxygenated blood to cardiac muscle

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