Autonomic Nervous System
Where are sympathetic fibers distributed and where are parasympathetic fibers distributed?
1) Sympathetic fibers are distributed throughout the whole body (sweat glands) 2) Parasympathetic fibers stay mainly internal and don't go into the extremities or body walls
What is the neurotransmitter used by both the para NS and the sym NS on the preganglionic synapse?
Acetylcholine
Central Nervous System
Brain and Spinal Cord
Anatomical Divisions of the Nervous System
Central nervous system and Peripheral nervous sytem
In a two neuron system where does the first neuron lie?
In the central nervous system.
The PNS relates mosts to _____________ functions.
Motor, involuntary (sympathetic or parasympathetic) or voluntary
Peripheral Nervous System
Nerves that leave the brain (cranial nerves) and nerves that leave the spinal cord (spinal nerves)
The CNS relates mostly to ______________ functions.
Sensory
Two components of the Autonomic Nervous System
Sympathetic Nervous System, Parasympathetic Nervous System
Which autonomic nervous system division has long preganglionic fibers and short postganglionic fibers?
The parasympathetic nervous system's fibers
Autonomic Nervous System
The portion of the peripheral nervous system that involuntary motor impulses make up. (smooth muscle, cardiac muscles, glands, etc.)
Which autonomic nervous system division has short preganglionic fibers and long postganglionic fibers?
The sympathetic nervous system's fibers
Both parasympathetic and sympathetic Nervous systems innervate what type of muscle?
cardiac muscle, smooth muscle, and glandsIn
Sympathetic Nervous system mainly functions for
fight or flight responses, or stress response
The sole mission in life of a preganglionic axon is to _______________________.
find a ganglion to synapse in
Motor Fibers
nerve fibers that bring information from the CNS into the PNS
Sensory Fibers
nerve fibers that bring information from the PNS into the CNS
What is the transmitter used by the sympathetic NS on the postganglionic synapse?
norepinephrine
In a two neuron system where does the second neuron lie?
outside of the CNS in a group of cells called ganglion
Parasympathetic Nervous system mainly functions for
rest and digest responses, or homeostasis
The parasympathetic nervous system originates from _____________.
the craniosacral origin, or Cranial Nerves 3, 7, 9, 10 and sacral nerves 2,3,4
What were ganglion embryonically formed by?
the neural crest cells
What was the CNS embryonically formed by?
the neuroectoderm
The sympathetic nervous system originates from _____________.
the thoracolumbar origin, or Thoracic nerves 1-12 and Lumbar nerves 1&2
