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Question
What is the correct order of these events-
A. Conversion of prothormbin to thrombin
B. Clot retraction and leakage of serum
C. Thromboplastin formation
D. Conversion of fibrinogen to fibrin
A: C-BAD
B: (+ADB
C: C_DBA
D: DA C_B
Answers
Explanation:
Blood clotting occurs following an injury or trauma. This is a mechanism to prevent excessive loss of blood from the body.
A clot is formed mainly of a network of threads, called fibrin.
An injury stimulates the platelets in the blood to release certain factors, which activate the mechanism of coagulation.
Platelets are a source of thromboplastin. Thromboplastin converts prothrombin, which is a plasma protein that is formed in the liver, into the enzyme thrombin.
In turn, thrombin converts fibrinogen into fibrin. Fibrin is insoluble and forms the threads that bind the clot.
Explanation:
Fauna is sometimes referred to as Fauns, meaning forest spirits. By definition, fauna is a group of indigenous animals of any geographical region. So, the term flora and fauna was coined by biologists to refer to a collection of plant and animal specifies in a given geographic location.
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