Haemostasis

Question 1

What does heamostasis mean?

Answer 1

To stop bleeding from a cut or injury to prevent further injury

Question 2

Describe haemostasis ?

Answer 2

Process of forming clots in the walls of damaged blood vessels and preventing blood loss

Question 3

What is vasoconstriction

Answer 3

When muscles contract
Platelets meet damaged blood vessel clot needs to form

Question 4

Platelet plug

Answer 4

Platelets stick to damaged endothelium to form platelet plug, temporarily sealing the break in vessel wall

Question 5

What is thrombopoietin?

Answer 5

A hormone produced by the liver and kidney which regulates production of platelets

Question 6

Haemostasis involves the following process?

Answer 6

Vasoconstriction
Formation of platelet plug
Blood coagulation

Question 7

How does haemostasis begin?

Answer 7

Begins with chemicals being released from damasked tissue cells extrinsic pathway and form platelets intrinsic pathway

Question 8

Extrinsic
Intrinsic

Answer 8

Extrinsic occurs immediately
Intrinsic is slower

Question 9

Blood clotting factors

Answer 9

Thromboplastin
Prothrombin
Fibrinogen

Question 10

What is the von williebrand factor?

Answer 10

Protein secreted by endothelial cells that connects platelets to collagen

Question 11

Explain Von williebrand disease

Answer 11

Inherited bleeding disorder from low levels of von williebrand factor