Wakefulness and sleep are part of the body's ____, which is a cyclic phenomena necessary for the body's rejuvenation.

A. REM cycle
B. regulatory system
C. circadian rhythm
D. immune system


Answer: C

Health Professions

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The white matter is more homogeneous in the spinal cord than in the brainstem

a. True b. False

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Since electrical burns can have a serious impact on the , the

Emergency Medical Responder should be on alert for further complications in the field. A. lungs B. heart C. brain D. sensory organs

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Firefighters should ___ and put all tools in a ready state before storing

A. inspect, clean, B. modify, clean, C. modify as needed D. inspect as needed

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The middle layer of the meninges, named for its spider web-like appearance, is the ____. 

A. subarachnoid space B. dura mater C. pia mater D. epidural space E. arachnoid mater

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