Dental OSCE (Objective Structured Clinical Examination) Practice Exam

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What is the normal range for platelet counts in the human body?

100,000-300,000
150,000-400,000
200,000-500,000
250,000-600,000

The correct answer is: 150,000-400,000

The normal range for platelet counts in the human body is generally accepted to be between 150,000 and 400,000 platelets per microliter of blood. This range is critical for maintaining hemostasis, as platelets play a vital role in blood clotting and the prevention of bleeding. A platelet count below this range can indicate thrombocytopenia, leading to an increased risk of bleeding, while a count above can suggest thrombocytosis, which can be associated with various conditions such as inflammation or malignancies. Understanding these values is essential for diagnosing and managing clotting disorders, as well as for evaluating a patient's overall hemostatic function. The other provided ranges, while they may reflect conditions that could occur in specific populations or individuals, do not align with the standard medical reference for normal platelet counts. Thus, recognizing the established range of 150,000 to 400,000 platelets is crucial for clinicians in their practice.