Tag: blood clotting and healing of wounds

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Questions Related to blood clotting and healing of wounds

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

The blood does not clot inside the body because of

  1. Oxygenation of blood

  2. Movement of blood

  3. Heparin in blood

  4. Absence of fibrinogen in blood
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A blood clot is actually the thickened mass formed by the blood platelets and stops the blood profusely out of any cuts or wounds. However, in general and in healthy condition blood does not form clots inside the body due to the presence of heparin an anticoagulant that is secreted by the basophils and mast  cells of the blood. Since, this is released into the blood vessels it prevents the formation of clots in them
So, the correct answer is 'Heparin in blood'
Multiple choice biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

Which option is correct for the formation of intrinsic factor-X activator complex for blood coagulation?

  1. Activated Christmas factor + AHG + phospholipid + $Ca^{+2}$
  2. Inactivated Christmas factor + AHG + phospholipid +$Ca^{+2}$
  3. Convertin + AHG + $Ca^{+2}$+ FSF

  4. Phospholipid - protein complex + Proconvertin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Hageman factor XII is activated when it comes in contact with a damaged blood vessel. The activated Hageman factor activates the factor XI. The activated factor XI acts on Chrishmas factor IX to form activated IXa. Factor IXa combines with AHG VIII phospholipid and calcium ions to form a complex called intrinsic factor X activator complex. Thus the correct answer is option A.

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

Match the following Columns I, II with III.

Column I(Common name) Column II(Roman numerical designation) Column III(Activation product)
A. Prothrombin 1. I (i) Convertin
B. Proconvertin 2. V (ii) Fibrin
C. Fibrinogen 3. II (iii) Thrombin
D. Proaccelerin 4. VII (iv) Accelerin

  1. A- 3- (iii), B- 4- (i), C- 1- (ii), D- 2- (iv)

  2. D- 4- (ii), B- 3- (iii) C- 2- (iv), A- 1- (i)

  3. C- 3- (iii), A- 4- (ii), B- 1- (iv), D- 2- (i)

  4. A- 3- (iii),C- 4- (i), D- 2- (ii), B- 1- (iv)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The following enzymes are involved in the mechanism of blood clotting in human.

Column I(Common name) Column II(Roman numerical designation) Column III(Activation product)
A. Prothrombin $3.$ II (iii) Thrombin
B. Proconvertin $4.$ VII (ii) Convertin
C. Fibrinogen $1.$ I (ii) Fibrin
D. Proaccelerin $2.$ V (iv) Accelerin
Multiple choice biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

Fill in the blanks with suitable words given below:
The liquid part of coagulated blood is known as _________

  1. Serum

  2. Fibrinogen

  3. Hemoglobin

  4. Pulmonary

  5. Sphygmomanometer

  6. Ventricles
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The liquid part of coagulated blood is known as serum. It is the liquid portion of blood clot . It includes all proteins not used in clotting of blood and all the electrolytes, hormones, antibodies, antigens etc..

Hence, the correct answer is 'Serum' .

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

Choose the correct answer from the alternatives given.
Which of the following ions is involved in blood clotting?

  1. $K^+$
  2. $Na^+$
  3. $Fe^{+++}$
  4. $Ca^{++}$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Blood coagulation is a complex biochemical process involving platelets and many proteins (enzymes).  Calcium is involved at several steps in the blood clotting, including the activation of the platelets, activation of clotting factors and enzymes which are present in the blood in inactive form. The $Ca^{++}$ ions bind with prothrombin and covert it into active form thrombin. The thrombin in turn converts fibrinogen into fibrin (a thread like protein) which traps red blood cells and helps in the formation of clot.

So, the correct option is '$Ca^{++}$'.

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

Sodium oxalate prevents blood clotting due to

  1. Blocking of fibrinogen transformation

  2. Covering RBC

  3. Inhibiting activity of clotting factor of plasma

  4. Combining with calcium ions of blood
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sodium oxalate, like citrates, can be used to remove calcium ions (Ca${^2}$${^+}$) from blood plasma. It thus prevents blood from clotting. In the presence of calcium ions and other clotting factors, factor X activates an enzyme called prothrombin activator. This enzyme then converts the plasma protein prothrombin into thrombin. Thrombin is an enzyme that, in turn, converts fibrinogen to fibrin.