plasma thromboplastin antecedent (PTA) definition of plasma thromboplastin antecedent (PTA) in the Free Online Encyclopedia.

thromboplastin: see blood clotting blood clotting, process by which the blood coagulates to form solid masses, or clots. In minor injuries, small oval bodies called platelets, or thrombocytes, tend to collect and form plugs in blood vessel openings.
..... Click the link for more information. .

thromboplastin [‚thräm·bō′plas·tən]

(biochemistry)

Any of a group of lipid and protein complexes in blood that accelerate the conversion of prothrombin to thrombin. Also known as factor III; plasma thromboplastin component (PTC).

Thromboplastin

(Factor III), an important coagulation factor in the blood-clotting system; it helps convert prothrombin into thrombin. Thromboplastin is localized in the membranes of formed elements of the blood and in the cells of various organs. A large amount of thromboplastin enters the blood upon injury to tissues. Brain and lung tissues have especially high thrombo-plastic activity, and lung thromboplastin also takes part in the metabolism of the vasoactive polypeptides angiotensin and bradykinin.

Chemically, thromboplastin is a protein-lipid complex. The basis of its activity is its lipid constituent, which contains serine, eth-anolamine, and choline phosphatides. Blood coagulation factors are adsorbed on the phospholipid micelle, creating favorable conditions for the enzymatic reactions involved in blood clotting.

The term “thromboplastin” is sometimes used to designate an active complex that includes, in addition to thromboplastin, a number of protein factors and Ca²⁺ ions. Such active thromboplastin, which directly converts prothrombin into thrombin, is also called thrombokinase or prothrombinase. Thromboplastin is used in clinical practice to determine the prothrombin level, an indicator of the condition of the blood-clotting system.

I. P. BASKOVA

Mentioned in	?		Encyclopedia browser	?		Full browser	?
No references found	Plasma Engine plasma etching plasma frequency Plasma Furnace plasma generator plasma gun plasma instability plasma jet plasma mantle Plasma Membrane Plasma Metallurgy plasma oscillations plasma physics plasma pinch plasma processing plasma propulsion plasma radiation Plasma Reactor plasma rocket plasma sheath plasma sheet plasma spraying Plasma Substitute plasma tail plasma thromboplastin antecedent plasma thromboplastin antecedent (PTA) plasma thromboplastin component Plasma Torch Plasma Treatment Plasma Turbulence plasma TV plasma wave plasma, biological Plasma, Blood Plasma, Solid-State plasma-addressed liquid crystal plasma-arc cutting plasma-arc welding plasma-jet excitation plasma-source ion implantation plasmacyte plasmagel plasmagene plasmalemma Plasmalogen plasmals plasmapause plasmapheresis plasmasol plasmasphere Plasmatron	Plasma Spray Plasma Spray Plasma Spray Unit Plasma spraying Plasma spraying plasma substitute plasma substitute plasma substitute PLAsma SupraThermal Ion Composition Plasma Synthetic Jet Actuator Plasma tail Plasma tail Plasma tail Plasma Technology Training School Plasma television Plasma Tetra Ethyl Oxysilane Plasma Theory and Simulation Group Plasma thrombopalastin antecent Plasma thrombopalastin antecent Plasma thrombopalastin antecent plasma thromboplastic antecedent deficiency plasma thromboplastic antecedent deficiency plasma thromboplastic antecedent deficiency plasma thromboplastic antecedent deficiency plasma thromboplastic antecedent deficiency plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent (PTA) plasma thromboplastin antecedent deficiency plasma thromboplastin antecedent deficiency plasma thromboplastin antecedent deficiency plasma thromboplastin antecedent deficiency plasma thromboplastin antecedent deficiency Plasma thromboplastin antecent Plasma thromboplastin antecent Plasma thromboplastin antecent plasma thromboplastin component plasma thromboplastin component plasma thromboplastin component plasma thromboplastin component plasma thromboplastin component plasma thromboplastin component (PTC) plasma thromboplastin component (PTC) plasma thromboplastin component (PTC) plasma thromboplastin component deficiency plasma thromboplastin factor plasma thromboplastin factor plasma thromboplastin factor plasma thromboplastin factor plasma thromboplastin factor plasma thromboplastin, A factor plasma thromboplastin, A factor plasma thromboplastin, A factor plasma thromboplastin, A factor plasma thromboplastin, A factor plasma thromboplastin, B factor plasma thromboplastin, B factor plasma thromboplastin, B factor

Mentioned in

Encyclopedia browser

Full browser

No references found

plasma thromboplastin antecedent (PTA)

Thromboplastin (redirected from plasma thromboplastin antecedent (PTA))

Thromboplastin
(redirected from plasma thromboplastin antecedent (PTA))