Hemostasis/Blood Type Flashcard

Front

What is hemostasis?

Back

Hemostasis is the process that prevents and stops bleeding, or hemorrhage. It involves a complex interaction between blood vessels, platelets, and various proteins in the blood.

Front

What are the three main stages of hemostasis?

Back

The three main stages of hemostasis are: 1) Vascular spasm (constriction of blood vessels), 2) Platelet plug formation, 3) Coagulation (blood clotting).

Front

What is the role of vascular spasms in hemostasis?

Back

Vascular spasms constrict the damaged blood vessel to reduce blood flow and minimize blood loss.

Front

What type of antibodies are present in blood type A?

Back

Blood type A has anti-B antibodies in the plasma.

Front

What happens during agglutination?

Back

Agglutination is the clumping of red blood cells (RBCs) that occurs when antibodies bind to antigens on the surface of RBCs, often due to incompatible blood transfusions.

Front

What is the function of calcium ions (Ca) in the clotting process?

Back

Calcium ions (Ca) play a crucial role in activating various clotting factors necessary for the coagulation cascade.

Front

What is the first step of hemostasis?

Back

The first step of hemostasis is the contraction of the blood vessel (vascular spasm) to reduce blood flow.

Front

What is a platelet plug?

Back

A platelet plug is a temporary aggregation of platelets that forms at the site of a blood vessel injury to help stop bleeding.

Front

What is the significance of thrombin in the clotting process?

Back

Thrombin is an enzyme that converts fibrinogen into fibrin, which forms the mesh that stabilizes the platelet plug and creates a blood clot.

Front

What is fibrin?

Back

Fibrin is a protein that forms a fibrous mesh in blood clots, providing structural support to the clot.