Choose the Most Correct Statement Concerning Capillaries

question 21

Multiple Choice

Choose the most correct statement concerning capillaries.

• A)Networks of capillaries are called capillary nets.
• B)Almost all capillaries are open at the same time.
• C)The only site of nutrient,gas exchange,and waste exchange is the capillaries.
• D)Pre-capillary sphincters contract to increase capillary flow.
• E)The walls of capillaries contain smooth musclE.

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