Tag: coagulation of blood

Questions Related to coagulation of blood

Haemophilia is a condition where there is 

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

  1. A failure in the clotting mechanism of blood

  2. A delay in the clotting of blood

  3. No production of haemoglobin in the blood

  4. No production of melanin in the skin

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Correct Option: A
Explanation:

  • Haemophilia is a group of hereditary genetic disorders in which the body's blood clotting ability fails to stop bleeding if any cut happens.
  • Thus, it is also known as bleeder's disease. One type of haemophilia called haemophilia A happens due to the deficiency of blood clotting factor VIII. 
Therefore, the correct answer is option A.

Which of the metallic ions is essential for blood clotting?

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

  1. Na$^+$

  2. Ca$^{++}$

  3. K$^+$

  4. Fe$^{++}$

Show answer
Correct Option: B
Explanation:
Calcium ions along with vitamin K are essential for clotting process as all the reaction in the clotting process take place in the presence of calcium ions. It is very important for the conversion reaction of prothrombin into the thrombin.
Therefore, the correct answer is option B.

Thrombin occurs in vertebrates in 

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

  1. The blood and gives it red colour

  2. The blood and is important for clotting

  3. The liver and is important for bile secretion

  4. The stomach and digests proteins

Show answer
Correct Option: B
Explanation:
Thrombin is a substance formed in one of the steps of clotting process from prothrombin. Thrombin, in turn, converts fibrinogen into fibrin which ultimately forms a clot. 
Thus, the correct answer is option B. 

In human, the prothrombin required for blood clotting is produced in 

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  1. Liver

  2. Stomach

  3. Pancreas

  4. Spleen

Show answer
Correct Option: A
Explanation:

In human, the prothrombin required for blood clotting is produced in the liver in the presence of vitamin K. It gets converted into thrombin in the presence of thromboplastin and thus forms an essential step in the clotting process. 

Therefore, the correct answer is option A.

Heparin in blood is released from  

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  1. Clumped platelets

  2. Mast-cell granules

  3. Non-granulocytes

  4. Granulocytes

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Correct Option: B
Explanation:
Mast-cell is a type of granulocyte. It contains basophil granules that secrete heparin and histamine in blood. They play important role in wound healing. 
Therefore, the correct answer is option B.

The blood component essential for blood coagulation is

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

  1. Albumin

  2. Globulin

  3. Fibrinogen

  4. Vitamins

Show answer
Correct Option: C
Explanation:

Coagulation or clotting is a process where the blood in liquid form turns into a gel. The mechanism involves activation, adhesion and aggregation of platelets and deposition of fibrinogen. Though this is an inactive clotting factor, it helps to clot by the formation of insoluble fibrin.

Therefore, the correct answer is option C.

The function of vitamin K is in 

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

  1. Regulation of calcium and phosphorus metabolism

  2. Blood clotting

  3. Respiration

  4. Carbohydrate metabolism

Show answer
Correct Option: B
Explanation:
Vitamin K plays an important role in blood clotting. It is required by the body for the synthesis of prothrombin by the liver. Prothrombin is a plasma protein which gets converted into thrombin during the clotting process and thus helps in clotting mechanism. 
Thus, the correct answer is option B. 

Blood clot inside a blood vessel is known as  

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  1. Thrombosis

  2. Agglutinin

  3. Clot

  4. Thrombus

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Correct Option: D
Explanation:

A blood clot that forms inside one of your veins or arteries is called a thrombus. A thrombus may also form in your heart. A thrombus that breaks loose and travels from one location in the body to another is called an embolus.

So, the correct option is 'Thrombus'.

Read the statements given below and choose the correct sequence of events leading the formation of a blood clot.
(i) Calcium activates an enzyme.
(ii) Fibrin binds platelets to form a 'plug'.
(iii) Thrombin converts fibrinogen to fibrin.
(iv) Platelets and damaged cells release an activator.

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

  1. (i), (ii), (iii), (iv)

  2. (ii), (i), (iii), (iv)

  3. (iii), (iv), (i), (ii)

  4. (iv), (i), (iii), (ii)

Show answer
Correct Option: D
Explanation:
The process of blood clotting starts with the release of thromboplastin from damaged cells and platelets. Thromboplastin converts plasma protein prothrombin into thrombin in the presence of calcium ions. Thrombin then converts soluble plasma protein fibrinogen into fibrin which binds platelets to form a clot. 
Therefore, the correct answer is option D. 

What happens when a clot occurs in an undamaged blood vessel?

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  1. The person would bleed to death.

  2. A scab will form on the skin surface.

  3. Platelets stick to the edges of the cut and to one another, forming a plug.

  4. The flow of blood to tissues beyond the clot may be cut off.

Show answer
Correct Option: D
Explanation:

When a clot occurs in an undamaged blood vessel, It stops the flow of blood to the rest of the tissue beyond the clot as, the blood can't flow through the clot. It causes paralysis in most of the cases. 

Therefore, the correct answer is option D.