In: Anatomy and Physiology
Blood vessel spasms following injury are stimulated by. Ans choice A: release of heparin from eosinophils B: the formation of fibrin clots C: serotonin release from platelets D: all of the above
ANSWER: C.Serotonin release from platelets
EXPLANATION:
Hemostasis is a process which causes bleeding to stop
it has 3 steps 1.vasoconstriction 2.platelet plug formation 3.blood coagulation or formation of fibrin clot
Vasoconstriction in which the smooth muscle in the vessel walls undergo intense contractions and increases blood pressure of affected vessel wall
if the vessels are small,spasms compress the inner walls together and may able to stop bleeding completely which is stimulated by the platelets from serotonin.