Leeches secrete a(n) ____ into the wound, which delays the formation of a scab and prevents the skin from sealing over too quickly.

A. enzyme
B. phosphate
C. harmless bacteria
D. anticoagulant

Answer: D

Health Professions

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Immediately following the onset of cardiac arrest, brain cells begin to die after:

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MMR contains thimerosal.

a. true b. false

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