Flashcards in Nervous System 4- Autonomic Nervous System Deck (26):
autonomic nervous system is divided into...
the vagus nerve is a part of the ____ section of the autonomic nervous system
TRUE OR FALSE?
the sympathetic preganglionic neurons originate in the craniosacral region
preganglionic neurons originate from the thoracolumbar region of the spinal cord
CRANIO is symp or parasymp?
Cranio is parasympathetic
thoracolumbar is symp or parasymp?
thoracolumbar is sympathetic
sacral is symp or parasymp?
Sacral is parasympathetic, but now thought to be sympathetic
In the sympathetic chain ganglia, is the preganglionic neuron myelinated or unmyelinated?
myelinated. (white rami)
In the sympathetic chain ganglia, is the post ganglionic neuron myelinated or unmyelinated?
unmyelinated. (gray rami)
what is a ganglia?
collection of neuron cell bodies outside the central nervous system
both the sympathetic and parasympathetic release ____ from preganglionic neuron
TRUE OR FALSE
norepinephrine is non excitatory
false. Norepinephrine is usually excitatory.
epinephrine and NE are in adrenal gland
TRUE OR FALSE
Acetylcholine (ACh) can be excitatory or inhibitory
chain ganglia and collateral ganglia are in the ____ NS
sympathetic nervous system
in the distribution of sympathetic fibres, preganglionic fibres are short. What is the exception?
- Adrenal ganglia have long preganglionic fibres and short postganglionic fibres. This is the exception to the sympathetic nervous system
in the sympathetic nervous system, the postganglionic fibres are typically ____
collateral ganglia is also called
prevertebral ganglia (sympathetic)
where is it that the ganglia are not paired?
celiac, superior mesenteric, inferior mesenteric
splanchnic nerves are ___ and converge in ____ganglia
Splanchnic nerves are preganglionic and converge in collateral ganglia
In the sympathetic collateral ganglia, the post ganglionic nerves innervate
visceral organs in the abdominopelvic region such as digestive system
Suprarenal (adrenal) medulla releases ____&____
epinephrine (75%) & norepinephrine
They act like all other postganglionic NS, but more slowly and for longer duration
Where are the ganglions in the parasympathetic nervous system?
near or on the target organs
the vagus nerve makes up ___% of the parasympathetic outflow
where does the vagus nerve originate?
The vagus nerve is the longest of the cranial nerve. It wanders from the brain into which organs?
vagus nerve wanders from the brain into organs in the neck, chest, and abdomen (except kidneys, bladder, and sex organs)
what is the general function of the parasympathetic nervous system?
relax, food processing, energy absorption