Certified Medical Assistant Practice Exam

Which of the following statements about leukocytes is NOT true?

1. Leukocytes fight infections

2. Leukocytes are white blood cells

3. Leukocytes are responsible for immune response

4. Leukocytes are responsible for blood clotting

The correct answer is: Leukocytes are responsible for blood clotting

Leukocytes, commonly known as white blood cells, play a crucial role in the body's immune response by identifying and fighting infections caused by pathogens such as bacteria, viruses, and other foreign invaders. As essential components of the immune system, they are vital for maintaining health and combating disease. Additionally, leukocytes are indeed white blood cells, confirming that they belong to the larger category of blood cells that are involved in immune responses. The statement regarding leukocytes and blood clotting is not accurate. While leukocytes are primarily involved in immune defense, the primary blood cells responsible for blood clotting are platelets, not leukocytes. Platelets are small cell fragments that help form clots to stop bleeding, making them essential for hemostasis. Thus, the assertion regarding leukocytes being responsible for blood clotting is the statement that does not hold true.