Tag: coagulation of blood

Questions Related to coagulation of blood

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

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

  1. Prothrombin

  2. Fibrinogen

  3. Thromboplastin

  4. Heparin.

Show answer
Correct Option: C

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.

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

  1. 1, 2, 3 correct

  2. 1, 2 correct

  3. 2, 4 correct

  4. 1, 3 correct.

Show answer
Correct Option: D

Which one of the following proteins is involved in the coagulation of blood

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

  1. Globulin

  2. Fibrinogen

  3. Albumin

  4. Serum amylase.

Show answer
Correct Option: B

In extrinsic clotting pathway, active factor VI activates factors

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

  1. X and XI

  2. IX and X

  3. IX and XI

  4. XI and XII.

Show answer
Correct Option: B

Which one functions as enzyme in blood clotting

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

  1. Prothrombin

  2. Calcium

  3. Thrombin

  4. Fibrin.

Show answer
Correct Option: C

Identify the correct sequence of blood coagulation (a) Activation of prothrombin (b) Formation of prothrombin activator (c) Formation of blood clot (d) Conversion of fibrinogen to fibrin

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

  1. b - d - a - c

  2. b - a - d - c

  3. a - d - c - b

  4. a - b - c - d

Show answer
Correct Option: B
Explanation:
Blood coagulation occurs in the following sequence:
  • Whenever there is rupture of blood vessels or damage is caused to blood, a complex of substances called prothrombin activator complex is formed. 
  • The activators convert prothrombin into thrombin.
  • Thrombin acts as an enzyme and converts fibrinogen into fibrin threads.
  • Fibrin threads accumulate and clump to form blood clot at the wound site.
So, the correct answer is 'b- a- d- c'.

The factor which initiates intrinsic pathway of blood clotting and triggers cascade reaction is

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

  1. Antihaemophiliac factor (VIII)

  2. Christmas factor (IX)

  3. Stuart-Prower factor (X)

  4. Hageman's factor (XII).

Show answer
Correct Option: D

Thrombokinase is associated with

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

  1. Elimination of area and other excretory products from the body

  2. Production of erythrocytes from the bone marrow

  3. Pulmonary and systemic circulation

  4. Cardiac cycle and its regulation

  5. Enzymatic reactions in coagulation of blood.

Show answer
Correct Option: E

Thrombokinase is associated with

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

  1. Ellimination of urea and other excreatory products from the body.

  2. Production of erythrocytes from the bone marrow.

  3. Pulmonary and systematic circulation.

  4. Cardiac cycle and its regulation

  5. Enzymatic reactions in coagulation of blood.

Show answer
Correct Option: E
Explanation:

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.

Hence, the correct option is E.

Which one has no clotting property?

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

  1. Blood

  2. Lymph

  3. Tissue fluid

  4. None of the above.

Show answer
Correct Option: A