8.1 PNS Organization Flashcards
1
Q
Cranial nerves
A
12 pairs, sensory, motor, mixed
2
Q
Spinal nerves
A
31 pairs, all mixed (sensory&motor)
8 cranial, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal
3
Q
Stuff coming in to the CNS
A
Sensory pathways aka afferent pathways
4
Q
Two subsets of sensory/afferent
A
Somatic - to cortex (senses, touch etc)
Visceral - to brain stem (BP, pH, etc)
5
Q
Stuff going out from CNS
A
Motor pathways / efferent pathways
6
Q
Two subsets of motor/efferent
A
Somatic (skeletal muscle)
Visceral aka Autonomic Nervous System (ANS) - HR, BP, GI,
- sympathetic branch (fight or flight)
- parasympathetic branch (rest digest
7
Q
Dual innervatuon
A
Two inputs to an organ (heighten one lower another at same time)
