Tag: blood clotting

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Questions Related to blood clotting

Multiple choice biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

Protein required for coagulation of blood is

  1. Haemoglobin

  2. Globulin

  3. Fibrinogen

  4. Albumin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The mechanism of blood clotting involves the presence of calcium and other clotting factors, Factor X activates an enzyme called prothrombin activator. The enzyme prothrombin activator then converts plasma protein prothrombin into thrombin. Thrombin is the enzyme which in turn converts fibrinogen into fibrin. Polymerized fibrin together with platelets forms a clot at the wound site. Hence Protein required for coagulation of blood is Fibrinogen. It is a blood plasma protein made in the liver and present in circulating blood.
So, the correct answer is 'Fibrinogen'
Multiple choice biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

Enzyme causing lysis of fibrin during fibrinolysis is

  1. Fibrinogen

  2. Plasmin

  3. Thrombin

  4. VIII Platelet factor
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fibrinolysis is a process that prevents blood clots from growing and becoming problematic. This process has two types: primary fibrinolysis and secondary fibrinolysis. The primary type is a normal body process, whereas secondary fibrinolysis is the breakdown of clots due to a medicine, a medical disorder, or some other causes. In fibrinolysis, a fibrin clot, the product of coagulation, is broken down. Its main enzyme plasmin cuts the fibrin mesh at various places, leading to the production of circulating fragments that are cleared by other proteases or by the kidney and liver. Hence Enzyme causing lysis of fibrin during fibrinolysis is plasmin.

So, the correct answer is 'Plasmin'.

Multiple choice biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

The coagulation of blood occurs due to

  1. Destruction of erythrocytes.

  2. Destruction of leucocytes.

  3. Change of fibrinogen into fibrin.

  4. Formation of serum.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The mechanism of blood clotting involves The presence of calcium and other clotting factors, Factor X activates an enzyme called prothrombin activator. The enzyme prothrombin activator then converts plasma protein prothrombin into thrombin. Thrombin is the enzyme which in turn converts fibrinogen into fibrin. Polymerized fibrin together with platelets forms a clot at the wound site. Hence The coagulation of blood occurs due to change of fibrinogen into fibrin.
So, the correct answer is 'Change of fibrinogen into fibrin'.
Multiple choice biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

Thrombokinase is produced in

  1. RBC

  2. WBC

  3. Blood vessels

  4. Blood clotting
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Thrombokinase is also known as thromboplastin. It is a complex enzyme which aids in clotting of blood. It is present in platelets and some body tissues. When the platelets aggregate at the site of injury, thrombokinase is released from platelets and damaged tissues. Thrombokinase converts prothrombin into thrombin which acts as an enzyme and converts fibrinogen into fibrin threads. The fibrin threads form a clot at the site of injury. Hence thrombokinase is produced in blood clotting.

So, the correct answer is 'Blood clotting'

Multiple choice biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

During blood coagulation, vitamin K helps in

  1. Formation of prothrombin

  2. Formation of thromoboplastin

  3. Conversion of fibrinogen into fibrin

  4. Conversion of prothrombin to thrombin.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vitamin K is a necessary cofactor for the liver to synthesize several clotting factors, most notably prothrombin (Factor II), as well as factors VII, IX, and X.

Multiple choice biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

Blood protein which initiates blood coagulation is

  1. Prothrombin

  2. Thrombin

  3. Fibrinogen

  4. Fibrin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Prothrombin is a plasma protein essential for blood clotting. Whenever there is an injury, prothrombin activator complex is formed. Prothrombin is converted into thrombin by activators. Thrombin acts as an enzyme and converts plasma protein fibrinogen into fibrin threads which form a clot at the site of injury and bleeding is stopped.
So, the correct answer is 'Prothrombin'.
Multiple choice biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

Which one of the following substances, if introduced in blood stream would cause coagulation of blood at the site of its introduction?

  1. Prothrombin

  2. Fibrinogen

  3. Thromboplastin

  4. Heparin.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Thromboplastin is the initiator of the extrinsic clotting pathway; introducing it directly into the bloodstream triggers the coagulation cascade at that site.

Multiple choice biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

Find the correct explanations about blood not clotting inside the vessels
1. Speedy flow prevents accumulation of fibrin threads if formed
2. Absence of anticoagulant heparin having antithrombin activity
3. Smoothness of endothelial lining preventing rupturing of platelets and formation of thromboplastin
4. Presence of a layer of negetively charged protein over the inner surface of endothelium that attracts clotting factors.

  1. 1, 2, 3 correct

  2. 1, 2 correct

  3. 2, 4 correct

  4. 1, 3 correct.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Blood does not clot inside vessels due to the smooth endothelial lining (preventing platelet rupture) and the rapid flow of blood (preventing the accumulation of clotting factors). Heparin is present as a natural anticoagulant, and the endothelium is negatively charged to repel platelets.