Blood Clotting aka "Hemostasis"

Question 1

Hemostasis :

Answer 1

the process that controls bleeding at the site of injury, aka “blood clotting”

Question 2

Blood loss is stopped by formation of…

Answer 2

… blood clots that seal the breaks in blood vessels

Question 3

Steps of Hemostasis :
-step 1…

Answer 3

Step 1) Vascular Spasm :
damage to the blood vessel wall it stimulates the smooth muscle wall to constrict

~why constriction? its going to limit the amount of blood going through

Question 4

Steps of Hemostasis
-step 2…

Answer 4

Step 2) Platelet plug : happens within 30-60 seconds
platelets stick to the exposed collagen (CT) from the damaged blood vessel wall, platelets stick to the collagen
—– which release prothrombin activator > prothrombin [produced in the liver + requires vita K] into THROMBIN [molecular scissors that cut protein] > fibrinogen (protein getting cut) > into FIBRIN fibers

Question 5

Steps of Hemostasis
-step 3…

Answer 5

Step 3) Coagulation :
blood vessel wall is no longer bleeding because of the FIBRIN fibers = which REINFORCE the clot

Question 6

What are platelets?

Answer 6

Fragments of cells called megakarocytes produced in the bone marrow