A break in a blood vessel occurs and damaged cells release chemicals to begin the process of blood clotting. As clotting gets under way, signals are sent by cells for each step to release more chemicals that accelerate the process. Eventually the wall is patched and bleeding is stopped. While the cells are signalling, what type of feedback is occuring?
a.This process is not controlled through feedback.
b.Positive and negative feedback are occuring together.
c.Positive
d.Negative



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