Peripheral Nervous System

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The Peripheral Nervous System
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Presentation transcript:

Peripheral Nervous System Chapter 13 Peripheral Nervous System

EQ: How is the Peripheral Nervous System (PNS) organized?

Organization of the PNS

PNS:definition Nerves connected to spinal cord Not part of CNS Receives sensory changes and control the muscles and organs Sensory division-senses Motor division-controls muscle and organs Called motor ending

EQ: What are the special cells of the PNS?

Sensory receptors Nerves of the sensory division Consists of 5 types Pick up stimuli from environment Internal or external Consists of 5 types Mechanoreceptors Sense touch, pressure, vibrations, stretching and itching Thermoreceptors Sense temperature

Types of sensory receptors (cont) Photoreceptors Sense light Chemoreceptors Sense chemicals (taste and smell) Nociceptors Pain receptors Sensory receptors can also be classified by location in the body and by structure

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