Lecture 5 Flashcards
Autonomic nervous system is responsible for ensuring _____
Homeostasis
Homeostasis
Response to internal and external stimuli to ensure a stable environment
Two neuron chain (2 types)
Presynaptic and postsynaptic
Autonomic nervous system controls everything except
Skeletal muscle
Two divisions of autonomic nervous system
Sympathetic and parasympathetic
Thoracolumbar division of sympathetic
Pre-synaptic fibers leave spine at the level of the thoracic vertebra and upper lumbar
Sympathetic synapse where
Paravertebral (sympathetic) chain
Sympathetic presynaptic are
Short
Sympathetic innervates
walls of organs, glands, and smooth muscle
Sympathetic post synaptic are
Long, lots of branching, diffuse effects
Which is the fight or flight division?
Sympathetic
Fight or flight is mediated through
Mostly epinephrine and norepinephrine release on target organs
Craniosacral division of parasympathetic
Pre-synaptic fibers leave spine at the level of Cn 3,7,9,10 and the sacrum
Parasympathetic synapse where
In or near target organ
Parasympathetic nervous system innervates
Walls of organs, glands, and smooth muscle
Parasympathetic presynaptic are
long???
Parasympathetic postsynaptic are
Short, less branching, discrete effects
Which is the rest and digest division?
Parasympathetic