JBL EMT Practice Exam

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Prepare effectively for the JBL EMT Exam with our interactive quiz filled with insightful questions and detailed explanations. Build your knowledge and confidence to pass the EMT certification.

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What is the function of platelets?

  1. Defense against invading organisms

  2. Initial formation of a blood clot

  3. Transport of cellular waste materials

  4. Transport of oxygen and nutrients

The correct answer is: Defense against invading organisms

Platelets, also known as thrombocytes, are small fragments of specialized cells that play a key role in the formation of blood clots to stop bleeding or repair damaged blood vessels. They do this by forming a sticky plug at the site of injury and releasing chemicals that promote blood clotting. Option B is the correct answer because platelets are primarily responsible for the initial formation of a blood clot. Option A is incorrect because defense against invading organisms is the function of white blood cells. Option C is incorrect because the transport of waste materials is the function of red blood cells. Option D is incorrect because the transport of oxygen and nutrients is the function of red blood cells, while platelets do not have this function.

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