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What are the major divisions of the PNS?
- Sensory (afferent)
- Motor (eferent)
How is the sensory division further classified?
Somatic sensory (general and special)
Visceral sensory (general and special)
What are general somatic senses?
touch, pain, pressure, vibration, temperature, and proprioception
What are special somatic senses?
hearing, equilibrium, vision
What are general visceral senses?
stretch, pain, temperature, chemical changes, irritation in viscera, nausea, hunger
What are special visceral senses?
taste, smell
How is the motor division further classified?
Somatic nervous system
Autonomic nervous system
, What is the somatic nervous system?
Motor innervation of all skeletal muscles
What is the autonomic nervous system?
Motor innervation of smooth muscle, cardiac muscle, and glands
How is the ANS further divided?
Sympathetic division and parasympathetic division
What kind of receptors are associated with sensory receptors?
Free nerve ending and complete receptor cells
What are complete receptor cells?
Specialized epithelial cells that monitor most types of special sensory information
What are motor endings?
Axon terminals of motor neurons
Innervate muscles and glands
What do exteroreceptors respond to?
Stimuli arising outside the body
touch, pressure, pain, temperature
What do interoreceptors respond to?
Stimuli from internal viscera
chemical concentration, taste, stretch, temperature
What do proprioreceptors respond to?
Location of skeletal muscles, tendons, joints, ligaments
Monitor stretch
What do mechanoreceptors respond to?