Chapter 15: Autonomic Nervous System Flashcards
2 Divisions of the autonomic nervous system
Sympathetic and PArasympathetic
ANS provides innervation for _____ motor activity
Visceral
Somatic nervous system supplies _____ skeletal muscles
Voluntary
T or F: sympathetic and parasympathetic has 2 visceral motor neurons: a pre- and postganglionic neurons
True
T or F: Dorsal root ganglion is sensory
True
ANS _____ fiber is lightly myelinated where as the ____ fiber is unmyelinated
Preganglionic; postganglionic
T or F: a somatic motor neuron is heavily myelinated
True
T or F: myelination insulates the fiber and increases nerve conduction speed
True
Division with the longest preganglionic fiber will send signals faster
True
- Parasympathetic
Sympathetic NS name
Thoracolumbar
Parasympathetic NS name
Craniosacral
Fight, Flight, Fright
Sympathetic nervous system
Rest and digest
Parasympathetic
Neurotransmitter for ANS
Acetylcholine
- except sympathetic postganglionic nerve
Neurotransmitter: sympathetic postganglionic nerve
Norepinephrine
Parasympathetic NS ____ heart rate and blood pressure and _____ gut motility and digestion
decreases; increases
T or F: Postganglionic nerve is essential within the walls of the organ innervated (very short length)
True
Sympathetic nervous system has its preganglionic cell body in the _____ of the thoracolumbar spinal cord
lateral horn
Sympathetic trunk ganglia run ____ to the spine
parallel
- provide the synapse for the Sympathetic NS preganglionic and postganglionic nerves
Sympathetic trunk ganglia are connected to local spinal nerves by
white and gray ramus
White rami have myelin and are therefore _____ nerve fibers
preganglionic
Gray rami lack myelin and represent ______ nerve fibers
postganglionic
Only the _____ NS supplies the following: sweat glands, hair raising muscles in skin, and smooth muscles of arteries and veins and the adrenal medulla
Sympathetic
