Platelets and Clotting Process Flashcards
1
Q
Do platelets have a nucleus?
A
No
2
Q
What is the primary function of platelets?
A
blood clotting
3
Q
What initiates the blood clotting cascade after a blood vessel injury?
A
Injury to a blood vessel triggers a cascade of events and vasoconstriction.
4
Q
What attracts platelets to the injury site?
A
Substances released by the broken vessel attract platelets to the site
5
Q
What happens when platelets reach the wound site?
A
Platelets rupture, release chemicals that produce the enzyme thromboplastin.
6
Q
What role does calcium (Ca²⁺) play in blood clotting?
A
Ca²⁺ binds thromboplastin with prothrombin to produce thrombin.
7
Q
How is thrombin produced?
A
Thrombin is produced when thromboplastin, Ca²⁺, and prothrombin react together.
