Lecture 8 Autonomic Nervous System Flashcards
What is the Autonomic Nervous System
Motor Pathways
Uses Cranial Nerves + Spinal Nerves
Controls Visceral Motor Effectors- cardian & smooth muscle, glands and gastric system - anything involuntary
What are the 2 divisions of the ANS
Sympathetic Division
Parasympathetic Division
Which division of the ANS prepares you for action
Sympathetic Division
“Gas pedal”
Influences heart rate
Which division of the ANS primarily control the heart rate
Parasympathetic division
Which division is for resting, digesting and helps w/ sleep
Parasympathetic
What is Dual Innervation
Both systems active at the same time
How many neurons are used in both sympathetic and parasympathetic motor pathways
2 neurons
1st neuron is Preganglionic
2nd neuron is Postganglionic
Where is the soma (cell body) of the pre-ganglionic neuron
In CNS (brain or spianl cord)
Where is postganglionic neuron located
In the ganglion
Where is the preganglionic neuron in the Sypathetic Division locates?
In thoracic or lumbar region of spinal cord
Short Axon
Releases Acetylcholine AcH
Describe the postganglionic neuron of the Sympathetic Division
Long axon
Releases Norepi
Describe the preganglionic neuron of the Parasympathetic Division
Soma (cell body) always in brain or sacral region
Long Axon
Releases AcH
Describe the postganglionic neuron of the Parasympathetic Division
Shot Axon
Releases AcH
