Monocytes

a. are the first phagocytes to exit the blood and arrive at an injured or invaded area
b. swell and mature into macrophages after exiting the blood
c. act as opsonins
d. have all of the above characteristics
e. have characteristics a and b


B

Anatomy & Physiology

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Indicate whether the statement is true or false

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Sacs lined with synovial membranes that act as cushions between bones and other structures are called ________

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