Question

Which chemical is released to bring about vasoconstriction during the vascular spasm phase of hemostasis:

a) Prothrombin activator
b) Fibrinogen
c) Thrombin
d) Fibrin
e) Histamine

Answer 1

The chemical released to bring about vasoconstriction during the vascular spasm phase of hemostasis is endothelins.

Step-by-step explanation:

The chemical released to bring about vasoconstriction during the vascular spasm phase of hemostasis is endothelins, which are one of the vasoconstrictors produced by activated platelets, leukocytes, and endothelial cells.