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Platelets

During blood ...

Question

During blood clotting, fibrin is produced from:

A

Thrombokinase

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B

Prothrombin

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C

Liver

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D

Proteolysis

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Solution

The correct option is B Prothrombin
During the process of blood clotting, platelets release thromboplastin which converts prothrombin into thrombin. This thrombin in presence of calcium ions is responsible for converting fibrinogen into insoluble fibrin, thus forming a clot.
So, the correct answer is 'Prothrombin'.

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Similar questions

Q. Select the correct option for given reaction occurs during blood clotting–

(i)

→ Thrombin → Fibrin

(ii)

→ Prothrombin → Thrombin

Q. In blood clotting, __________ converts the inactive fibrinogen to insoluble fibrin.

Q. Which of the following is / are wrong about blood clotting?
A. Fibrinogen

T h r o m b o p l a s t i n - -------- \to T h r o m b i n

B. Injured tissue + blood Platelets

\to

Release thromboplastin
C. Prothrombin

T h r o m b i n - ----- \to

fibrin
D. Fibrin + Red Blood corpuscles

\to

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Q. Which of the following statements are correct?

C a^{+ 2}

is necessary for blood coagulation.
(ii)Coagulation in blood vessel is prevented during normal condition by heparin.
(iii)Clotting of blood involves changes of fibrinogen to fibrin by thrombin.
(iv)Blood clotting involves cascading process involving a number of factors present always in the active form.

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