Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Lauralee Sherwood
Chapter10: The Blood Vessels And Blood Pressure
Section: Chapter Questions
Problem 11RE
Related questions
Question
There is a micro tear in one of your blood vessels. Chemicals are released at the injury site that
attract platelets to the site to form a plug and stop the loss of blood. As platelets arrive at the injury site,
more chemical is released attracting more and more platelets. The platelet’s arrival causes the release
of more chemical, attracting more platelets, and so on until a complete platelet plug is formed in the
vessel tear and bleeding is stopped.
a. What is the stimulus?
b. Is the stimulus stopped/reversed or is it enhanced?
c. Is the body’s response a negative or positive feedback?
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