What is the normal platelet count range in thousands per microliter?

• A. 100-300
• B. 150-400
• C. 200-500
• D. 250-600

Answer: (B)

The normal range for platelet count is typically between 150,000 and 400,000 platelets per microliter of blood, which means that a count expressed in thousands would indeed be represented as 150-400. This range is essential for the proper functioning of hemostasis, as platelets play a crucial role in blood clotting and maintaining vascular integrity.

A count below this range can indicate thrombocytopenia, which increases the risk of bleeding, while a count above this range can indicate thrombocytosis, leading to a risk of thrombosis. Understanding the normal platelet range is critical for diagnosing various hematological conditions and for monitoring patients who might be on anticoagulation therapy or those undergoing certain treatments that affect platelet levels.