Blood Coagulation (Secondary Homeostasis)

Question 1

The platelet plug is _____ at first, but it is
usually successful in blocking blood loss if the vascular opening is small

The plug can be washed away, unless
supported by a ____

During the subsequent process of blood coagulation, ______ threads form.
These threads attach tightly to the platelets, thus constructing an unyielding blood clot.
This is the ______ step in hemostasis.

Answer 1

Loose; clot; fibrin; 3rd

Question 2

The clot begins to develop in ______ to _____ seconds if the trauma to the
vascular wall has been _____ and in ______ to ______ minutes if the trauma has been ______.

The formation of _______ occurs in and around the platelet plug and
the plug formed is a stable one.

Answer 2

15-20; severe
1-2; minor
Blood clot;

Question 3

promote coagulation :
inhibit coagulation :

Answer 3

procoagulants; anticoagulants

Question 4

Blood coagulation occurs in three major stages:
Stage 1: Activation of _________ factor (formation of prothrombin
activator or factor _____)
Stage 2: Formation of thrombin from _______
Stage 3: Formation of ______ from fibrinogen

Answer 4

Stuart-Prower, Xa;
Prothrombin
Fibrin