Implementation Manager (IM) Specialist CHTS Practice Test

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What is the primary function of platelets in the blood?

  1. Transport oxygen

  2. Fight infection

  3. Clot blood

  4. Regulate body temperature

The correct answer is: Clot blood

The primary function of platelets in the blood is to clot blood. Platelets, or thrombocytes, are small cell fragments that play a crucial role in hemostasis, the process that prevents and stops bleeding. When a blood vessel is injured, platelets quickly accumulate at the site of the damage and adhere to the exposed tissue. They aggregate, forming a temporary "platelet plug," and release chemical signals that enhance the clotting process. This action not only helps to stop the bleeding but also initiates the healing process. In the context of the other functions mentioned, transporting oxygen is primarily the role of red blood cells, while fighting infections is the primary function of white blood cells. Regulating body temperature is a function associated with the broader physiological processes of the body, involving mechanisms such as sweating and blood flow adjustments. Therefore, platelets are specifically designed for the purpose of blood clotting, distinguishing their role from the other functions.