Question Video: Recalling the Mechanism of Fibrin in the Blood Clotting Response Biology • Second Year of Secondary School

Video Transcript

The diagram shows a basic overview of the blood-clotting process in a small wound. What is trapped in the net that fibrin forms? (A) Collagen and clotting factors. (B) Platelets and red blood cells. (C) Calcium ions and prothrombin. Or (D) dead skin cells and thromboplastin.

Let’s start by reviewing what fibrin is and its role in blood clotting. Fibrin is in insoluble proteins formed from fibrinogen during the clotting of blood, which forms a fibrous mesh that impedes the flow of blood. In fact, we can see in the diagram an example of the net that fibrin forms. This fibrin net is formed over the platelet plug that initially aggregates after the damage to a blood vessel. And as this fibrin net is forming, it traps more platelets as well as red blood cells into what will become the blood clot.

So, what gets trapped in the fibrin net? Platelets and red blood cells. Therefore, the correct answer must be (B). Platelets and red blood cells are trapped in the net that fibrin forms.