alleryStart learning →What happens to about one-third of platelets after they enter the circulation?
AThey are destroyed by the liver at once
BThey attach to the vessel endothelium
CThey return to the marrow to mature
DThey migrate to the spleen for storage
Answer & Solution
Correct answer: D. They migrate to the spleen for storage
1. Platelets enter the circulation already able to act, so they do not return to the marrow.
2. Approximately one-third migrate to the spleen for storage.
3. That stored pool is released later in response to a rupture in a blood vessel.
4. Holding a reserve is what lets the body mount a plug faster than new platelets could be made.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 18 "The Cardiovascular System: Blood", section 18.4 Leukocytes and Platelets_
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