Choose the Most Correct Statement Concerning Capillaries

question 3

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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