Exam (elaborations)
The Peripheral Nervous System (PNS) Questions & Detailed Answers
- Course
- Peripheral nervous system
- Institution
- Stanford University
The Peripheral Nervous System (PNS) Questions & Detailed Answers
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The Peripheral Nervous System (PNS) Questions &Detailed Answers
The peripheral nervous system (PNS) consists of... - ANS nerves,ganglia, sensory
receptors and efferent nerve endings.
What is a nerve? - ANS it is a cordlike organ composed of numerous nerve fibers
(axons) bound together by connective tissue, a nerve may contain a few nerve
fibers or hundreds of thousands
Name the spinal nerve axons that are grouped off of their connective tissue
sheathes: - ANS Endoneurium- a fiber is a single axon within this
Perineurium- a fascicle is a bundle of fibers within this
Epineurium- a nerve is a bundle of fascicles within this
There are numerous blood vessels within the covering
How are cranial or spinal nerves classified? - ANS they are classified accourding to
the direction in which they transmit impulses
Mixed nerves: - ANS contain both sensory and motor fibers: most are mixed nerves
Sensory, or afferent, nerves: - ANS carry impulses only toward the CNS
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