What Is the Purpose of the Sphincters Where the Arterioles

question 42

Multiple Choice

What is the purpose of the sphincters where the arterioles branch into the capillary beds?

• A) To slow down blood flow so the capillaries don't burst under pressure
• B) To control blood flow to different areas of the body depending on activities
• C) To speed up blood flow into the capillary bed for faster oxygen exchange
• D) To block blood from coming back out of the capillary bed too quickly to allow for more complete diffusion of oxygen
• E) They remove carbon dioxide from blood passing through.

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