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GENERAL MECHANISM OF BLOOD COAGULATION -
All researchers agree that blood clotting is a cascade mechanism and involves three essential steps - (a) Formation of prothrombin activator. It is formed in two ways :
Extrinsic pathway -
Intrinsic pathway
(b) Conversion of prothrombin into thrombin -
(c) Conversion of fibrinogen into fibrin -
Thrombin
Fibrinogen Fibrin Threads (insoluble)
(soluble)
Fibrin threads form a meshwork which traps blood cells and platelets to form a clot so the process is called blood clotting. Within a few minutes, the clot begins to contract and a pale coloured fluid called serum is discharged. This is called clot-retraction.
Compare and contrast covalent and ionic bonds in molecules, give an example of each.
Describe how the International Astronomical Union defines a planet. Also include why Pluto is no longer considered a planet.
From the following, name the type of mimicry by which a palatable, acceptable insect mimics an unfavorable, noxious insec for protection. a) Batesian mimicry (pron: BATE-see-an
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Using copious sterile saline irrigation This can be delivered from a sterile infusion bag in a pressure cuff or a peristaltic pump. The drills can be adequately cooled by spray
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