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QuizMultiple Choice

Unit Test — Unit test

Question 2 • NY-Life Science: BiologyTerm 2 Hillcrest

Which lists the correct order of events in the healing of cuts?

Answer
A
red blood cells trapped in fibrin net, net formation by platelets, vessel constriction
B
vessel dilation, platelet plug formation, net formation by red blood cells
C
vessel constriction, platelet plug formation, net formation by fibrin threads
D
platelets trapped in fibrin net, net formation by white blood cells, vessel dilation

Explanation

When a cut occurs, the injured blood vessel first constricts to reduce blood loss. Platelets then gather at the injury and form a temporary plug. Finally, fibrin threads form a mesh that strengthens the plug and traps blood cells, so the correct order is vessel constriction, platelet plug formation, and net formation by fibrin threads.

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