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 3RE
Related questions
Question
40.
If all the pre-capillary sphincters should be open at the same time, the blood pressure will drop.
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True
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False
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Expert Solution
Step 1
Pre capillary sphincter are the rings of smooth muscles that ate known to regulate blood flow in the capillaries.
Sphincter can open and close the entrance of the capillary, which causes change in the blood flow in the capillary.
If all the pre capillary sphincters are open the blood will flow into the associated branches of capillary. When capillaries dilate blood flow is increased due decrease in vascular resistance an increase in cardiac output.
Hence dilation of arterial blood vessels decreases blood pressure.
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