Blood - Platelets and Heamostasis 0.0 / 5 ? Human BiologyAnatomy, Physiology, BloodUniversityNone Created by: une-meduseCreated on: 24-02-14 19:53 57328410169 Across 1. The series of reactions set in motion to stop bleeding after a blood vessel wall breaks (11) 5. ____________ and thromboxane A2 enhance vascular spasm and platelet aggregation (9) 6. In most cases activation turns most clotting factors into _________ (7) 9. There are essentially three steps to haemostasis: vascular spasm, platelet plug formation and ___________ (11) 10. During vascular spasm, blood vessels ____________ to significantly reduce blood loss (9) Down 2. When platelets adhere to collagen, they release chemical messengers including: _______, serotonin and thromboxane A2 (9, 11) 3. Platlets are kept mobile but inactive by ________ and prostacyclin, which are secreted by endothelial cells lining the blood vessels (6, 5) 4. Coagulation reinforces platelet plug with __________ that act as glue (6, 7) 7. The mature megakaryoblast presses against a sinusoid in the _________ and sends cytoplasmic extensions through the _______ wall, which rupture and release platelets into the bloodstream (3, 6, 8) 8. ____________ are essential for the clotting process that occurs when blood vessels are ruptured (9)
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