Circ pt2 (blood clots and blood types) Flashcards
revise :)
What is an antigen?
A marker on the outside of cells that helps the body recognize foreign substances.
What is an antibody?
A protein the body produces to attack foreign substances by binding to non-self antigens.
If you have A+ blood, what antigens and antibodies do you have?
A+ blood has A antigens, Rh antigens, and anti-B antibodies. It does not have anti-Rh antibodies.
What are the four components that make blood clotting possible?
Platelets, clotting factors, fibrin, and other cells (red and white blood cells).
What is the role of platelets in blood clotting?
Platelets plug the wound by sticking to the opening and closing it.
How do clotting factors contribute to blood clotting?
Clotting factors reinforce platelets by sticking to them and helping stabilize the clot.
What is fibrin, and what is its function in blood clotting?
Fibrin is a protein mesh that acts like glue, holding platelets and clotting factors together.
How do red blood cells contribute to blood clotting?
Red blood cells help form the clot’s structure by getting trapped in the fibrin mesh.
How do white blood cells contribute to blood clotting?
White blood cells help prevent infection at the injury site while the clot forms.
What is clot retraction?
A process where the blood clot contracts, becoming denser and pulling the edges of the wound together.
What happens during clot retraction?
Serum is squeezed out, and the clot dries, forming a scab to prevent infection.
