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Chapter Assessment Lesson 6.4
Learning Key Terms and Concepts
In a nerve, each axon fiber is covered by a fine sheath called the _____.
Groups of these sheathed fibers are bundled into fascicles surrounded by the _____.
Groups of fascicles and blood vessels are surrounded by the _____.
Mixed nerves carry both _____ impulses and _____ impulses.
The body has how many pairs of cranial nerves does the body have?
The body has how many pairs of spinal nerves does the body have?
Spinal nerves are divided into a(n) _____ ramus and a(n) _____ ramus.
The parasympathetic nervous system controls all of the automatic functions of the _____, _____, and _____ systems.
Thinking Critically
Explain what happens physiologically when the fight-or-flight response has been activated in the body.
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