3 Questions
What is the function of arterioles in relation to capillary beds?
Arterioles reduce or shut off blood flow to capillary beds
What is the name of the slight thickening of the smooth muscle at the origin of a capillary bed from an arteriole?
Pre-capillary Sphincter
What happens when the smooth muscle in the wall of an arteriole contracts?
The blood flow to the capillaries reduces or shuts off
Study Notes
Arterioles and Capillary Beds
- Arterioles are responsible for regulating blood flow into capillary beds by controlling the amount of blood that enters the capillaries.
- The slight thickening of the smooth muscle at the origin of a capillary bed from an arteriole is called a metarteriole.
- When the smooth muscle in the wall of an arteriole contracts, the arteriole constricts, reducing blood flow into the capillary bed.
- Conversely, when the smooth muscle relaxes, the arteriole dilates, increasing blood flow into the capillary bed.
Test your knowledge of cardiovascular physiology with this quiz! From pre-capillary sphincters to arterioles and blood flow regulation, this quiz will challenge your understanding of the intricacies of the cardiovascular system. Don't miss out on the opportunity to expand your knowledge and improve your cardiovascular expertise!
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