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Questions and Answers
What is the function of arterioles in relation to capillary beds?
What is the function of arterioles in relation to capillary beds?
- Arterioles allow blood to flow freely into capillary beds
- Arterioles reduce or shut off blood flow to capillary beds (correct)
- Arterioles control the flow of oxygen through the capillary beds
- Arterioles serve as a storage site for excess blood
What is the name of the slight thickening of the smooth muscle at the origin of a capillary bed from an arteriole?
What is the name of the slight thickening of the smooth muscle at the origin of a capillary bed from an arteriole?
- Capillary Bed
- Pre-capillary Sphincter (correct)
- Arteriole Sphincter
- Vascular Resistance
What happens when the smooth muscle in the wall of an arteriole contracts?
What happens when the smooth muscle in the wall of an arteriole contracts?
- The blood flow to the capillaries increases
- The blood flow to the capillaries reduces or shuts off (correct)
- The precapillary sphincter opens
- The vascular resistance decreases
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