CHAPTER 10.4 (F4): BLOOD CLOTTING MECHANISM

Why is maintaining blood pressure important in the context of blood clotting?

• To ensure faster healing of the wound

• To prevent excessive blood loss from lowering blood pressure to dangerous levels

• To increase the flow of nutrients to the injured area

• To enhance the body's energy levels

What is the primary purpose of blood clotting?

• To increase blood flow

• To prevent excessive bleeding

• To decrease blood pressure

• To enhance oxygen transport

What are the function of platelets in blood clotting mechanism?

• Secretes thrombokinase enyme

• Forms temporary platelet plug

• Produces prothrombin

• Forms a fibrin mesh

What is the role of thrombokinase in the blood clotting process?

• It converts fibrinogen to fibrin.

• It activates prothrombin to thrombin.

• It dissolves blood clots.

• It acts as a vitamin K inhibitor.

Which of the following are the correct statements about prothrombin in blood clotting?

• Synthesized by the liver using vitamin K

• Inactive enzyme found in the blood

• Converted into thrombin by thrombokinase

• Turns fibrinogen into fibrin mesh

What is the cofactor needed to convert prothrombin into thrombin by the thrombokinase?

• Sodium ions (Na⁺)

• Magnesium ions (Mg²⁺)

• Potassium ions (K⁺)

• Calcium ions (Ca²⁺)

Which of the following is responsible to convert fibrinogen into fibrin mesh (to trap the erythrocytes)?

• Thrombin

• Prothrombin

• Thrombokinase

• Platelets

Which protein is responsible for forming a network to trap erythrocytes and close the wound?

• Immunoglobulin

• Erythrocytes

• Albumin

• Fibrinogen

What is the state of fibrinogen before it is converted in the blood clotting process?

• Insoluble protein

• Soluble protein

• Active enzyme

• Inactive enzyme

Reorder the mechanism of blood clotting.

• Fibrin mesh traps erythrocytes and later forms a scab

• Open wound attracts more platelets and clotting factors. The blood vessels constrict to reduce the blood flow.

• Platelets are activated to form a temporary platelets plug and release out thrombokinase.

• Thrombokinase converts the prothrombin (inactive enzyme) into thrombin (active enzyme)

• Thrombin converts fibrinogen (soluble protein) into fibrin mesh (insoluble protein)