How Are Platelets Released into Peripheral Circulation from the Bone

question 8

Multiple Choice

How are platelets released into peripheral circulation from the bone marrow?

• A)Mature platelets squeeze between sinusoid endothelial cells.
• B)Megakaryocyte cytoplasmic fragments extend through the endothelial cells, lining the sinusoids, into blood and then shed platelets.
• C)Platelets adhere to white cells and exit with them.
• D)Megakaryocytes exit the marrow with white cells, and then platelets fragment off once they reach the blood.

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