ANS Phys Flashcards
Somatic NS involves (voluntary)
-Skeletal muscle
-only ONE motor neuron
-Consciously perceived senations
-can only excite
-NO ganglia
ANS Involvement (involuntary)
-Innervates cardiac and smooth muscle glands
-2 motor neurons
-unconsciously senses visceral sensations
-can excite or inhibit
-HAS ganglia
where are the sympathetic chain ganglia found?
parallel to the vertebral column
Sympethetic prevertebral/collateral ganglia are found
anterior to vertebral column near large abdominal arteries
The sympathetic NS connects to the adrenal medulla via:
Modified ganglia
parasympathetic terminal/intramural ganglia are found
near or in the wall of the organ it innervates
Location of the sympathetic NS
T1-L2 in the lateral grey horns
the location of the parasympathetic NS
Cranial nerves III, VII, IX, X and sacral lateral grey horns
Preganglionic length in the SNS
Short
Preganglionic Length in the PNS
Long
Post ganglionic length in SNS
Long
Post ganglionic length in the PNS
Short
SNS Neurotransmitter of postganglionic neuron
Norepinephrine NE
PNS Neurotransmitter of postganglionic neurons
acetlycholine ach
SNS =
Fight or flight responce
PNS =
Rest and digest
The adrenal medulla receives stimulation from:
sympathetic preganglionic fibers
Autonomic nervous system preganglionic fibres are
myelinated type B fibers
White rami communicantes are so named since:
autonomic preganglionic neurons are myelinated
Where are the sympathetic chain ganglia found?
on either side of the spine close to the vertebrae
Which neurotransmitter is used to stimulate the effectors in the sympathetic division of the ANS?
norepinephrine
What is the major type of sensory information that is monitored by the Autonomic nervous system?
sensations from the visceral/internal organs
Parasympathetic ganglia are known as
as terminal ganglia.
The cell bodies of some parasympathetic central neurons are located:
in the brain stem.
The sympathetic ganglia that lie close to large abdominal arteries and anterior to vertebral column are the:
prevertebral ganglia
The concept that most internal organs receive innervation from both the sympathetic and parasympathetic nervous systems is called:
dual innervation
Which structures receive sympathetic innervation from the superior cervical ganglia?
the head
The motor impulses from the ANS innervate which of the following?
cardiac muscle, smooth muscle, and glands
Effectors innervated by the parasympathetic nervous system are stimulated by which neurotransmitter.
acetylcholine
How many sets of neurons are found in each autonomic motor pathway?
2
Which of the following responses is initiated by the sympathetic nervous system?
increased synthesis of ATP
The post ganglionic fibres in the ANS are what type of fibres?
Type C
When the parasympathetic system is active it decreases the activity of which of the following organs.
heart
What does “SLUDD” stand for in regards of the parasympathetic nervous system:
salivation, lacrimation, urination, digestion, defecation
Parasympathetic innervation to the distal colon, the bladder and the reproductive organs is supplied by which of the following:
sacral nerves
The cranial nerves involved in the parasympathetic system are:
III, VII, IX, X
Postganglionic fibers that innervate sweat glands, arrector pili muscles, blood vessels to skin and skeletal muscles travel with which structure?
spinal nerves
Where are the central neurons cell bodies of the sympathetic division of the ANS found?
T1 to L2
A single sympathetic preganglionic fiber may synapse with
twenty or more postganglionic fibers.
The arrector pili, sweat glands and adipose cells only receive innervation from the
sympathetic nervous system.
Parasympathetic stimulation to the liver, stomach and gallbladder is provided by fibers travelling with the:
vagus nerve
Which of the following is supplied with sympathetic innervation by way of the splanchnic nerves from the prevertebral ganglia?
abdominal viscera
Autonomic central neurons synapse with ganglionic neurons:
in ganglia
The major control and integration centre for the autonomic nervous system is the:
hypothalamus
The postganglionic fibers of the sympathetic division of the ANS are short or long?
long
two divisions of the ans
sympathetic and parasympathetic
