Tag: soldiers of defense
Questions Related to soldiers of defense
Thrombokinase is associated with
-
Ellimination of urea and other excreatory products from the body.
-
Production of erythrocytes from the bone marrow.
-
Pulmonary and systematic circulation.
-
Cardiac cycle and its regulation
-
Enzymatic reactions in coagulation of blood.
Thrombokinase is a substance present in platelets which are necessary for coagulation of blood. Thromboplastin helps in the conversion of prothrombin to thrombin in the presence of calcium which is the vital step in coagulation of blood.
Which one has no clotting property?
-
Blood
-
Lymph
-
Tissue fluid
-
None of the above.
Blood agglutination tests are used in
-
Antigen antibody reaction
-
Animal relations
-
Immunity
-
None of the above
Blood precipitation test was proposed by
-
Wallace
-
Nuttal
-
Bateson
-
Needham
Conversion of fibrinogen to fibrin is catalysed by
-
Thrombin
-
Prothrombin
-
Thromboplastin
-
All of these
During the process of blood coagulation, vitamin k helps in
-
The formation of thromboplastin
-
The conversion of fibrinogen to fibrin
-
The conversion of prothrombin to thrombin
-
The formation of prothrombin
Vitamin K helps in the synthesis of prothrombin in the liver.
In the clotting mechanism pathway, thrombin activates the factors
-
XI, VIII, V
-
XI, IX, X
-
VIII, X, V
-
only XIII
In the blood coagulation pathway thrombin activates Factor XIII to XIIIa that helps in binding of fibrin monomers to form the stable fibrin filament.
Which proteolytic enzyme induces lysis of fibrin during fibrinolysis?
-
Fibrin
-
Thrombin
-
Plasmin
-
Platelet factor VIII
Plasmin is the proteolytic enzyme that induces lysis of fibrin to fibrin degradation products during fibrinolysis (enzymatic breakdown of fibrin during blood clots)
Mark the pair of substances among the following which is essential for coagulation of blood.
-
Heparin and calcium ions
-
Calcium ions and platelet factors
-
Oxalates and citrates
-
Platelet factors and heparin
Calcium
ions and platelets are essential factors for clotting of blood. During some
injury, the platelets release inactivated platelet factors that are involved in
the activation of other factors involved in the formation of clots in the blood.
Calcium ions in the blood catalyze the
activation of many factors involved in clot formation like factor VIII, factor
IX, factor V and factor XIII.
Thus, the correct answer is 'Calcium ions and platelet factors.'
Which of these are necessary for initiation of blood clotting process?
-
Prothrombinase and thrombin
-
Tissue factor hageman factor and $Ca^{2+}$
-
Prothrobinase and $K^{2+}$
-
Prothrobinase , tissue factor and $Ca^{2+}$
There are two processes that can initiate clotting
- A very rapid process the so-called extrinsic pathway
- A slower but larger intrinsic pathway