Florida Basic Recruit Training Program High Liability (First Aid) Practice Exam

Which blood component helps in the repair of tissues by forming clots?

1. White blood cells

2. Red blood cells

3. Plasma

4. Platelets

The correct answer is: Platelets

Platelets are essential components of the blood that play a crucial role in the process of hemostasis, which is vital for tissue repair. When an injury occurs, platelets quickly adhere to the site of damage and aggregate with one another, forming a temporary plug to stop bleeding. This aggregation is part of a more complex process that involves the activation of clotting factors, leading to the formation of a fibrin mesh that stabilizes the clot. The primary function of platelets in clot formation and tissue repair highlights their importance in preventing excessive blood loss and facilitating the healing process. They release growth factors that further aid in tissue repair, promoting healing in the affected area. In contrast, while white blood cells are involved in immune response and combat infections, red blood cells primarily function to transport oxygen and carbon dioxide throughout the body. Plasma, the liquid component of blood, contains water, electrolytes, and proteins but does not participate directly in clot formation. Understanding the distinct roles of these blood components clarifies why platelets are specifically responsible for tissue repair through clot formation.