Module 10: Autonomic Nervous
System (Anatomy 337 UW Madison
Exam 2)
The nervous system can be divided into two functional parts. What are they?
- -the somatic nervous system and the autonomic nervous system.
- What does the somatic nervous system cause? - -The somatic nervous
system causes voluntary contraction of skeletal muscles
- What does the autonomic nervous system control? - -The autonomic
nervous system controls involuntary contraction of cardiac and smooth
muscle, as well as glandular tissue.
- In the autonomic nervous system, stimulation can either______ or ______the
effector. That means it can cause ______________. or _________ from a ________,
or it can ______ those actions from occurring. - -excite, inhibit, muscle
contraction, secretion, gland, prevent
- -How many lower motor neurons does the somatic nervous system have?
-Is there a synapse between neurons?
-Is ganglia present?
-Where does the lower motor neuron originate? - --just one lower motor
neuron
-Since there is only one neuron, there is no synapse
-no ganglia.
-That lower motor neuron originates in the ventral (anterior) horn of the
spinal cord.
- -How many lower motor neurons does the autonomic nervous system
have?
-Is there a synapse between neurons?
-Is ganglia present?
-Where does the lower motor neuron originate? - -- there are two neurons
-Yes
-The synapse between the two neurons occurs at a ganglion, or a collection
of cell bodies.
- The neurons that originate in the spinal cord begin in the lateral horn.
- In the somatic nervous system, are the lower motor neuron axons
myelinated?
, If so, what does this result in ? - -In the somatic nervous system, the lower
motor neuron axons are highly myelinated, allowing for a very rapid signal
transmission from the spinal cord to the effector.
- In the autonomic nervous system, are the lower motor neuron axons
myelinated?
If so, what does this result in ? - -In the autonomic nervous system, the
axons are either lightly myelinated (meaning a thin layer of myelin) or
unmyelinated, resulting in a slower conduction speed.
- What are the two divisions of the autonomic nervous system? - -the
sympathetic division and the parasympathetic division.
- What response is the sympathetic division associated with?
Where does its pathways originate?
What do they call it? - --The sympathetic division is associated with the
fight-or-flight response, preparing the body to respond to potentially
dangerous situations.
- the thoracic and first two lumbar levels of the spinal cord,
-"thoracolumbar division"
- What response is the parasymphateic division associated with?
Where does its pathways originate?
What do they call it? - -The parasympathetic division is associated with rest
and digest, conserving energy, replenishing energy stores, and conducting
routine maintenance.
-Its pathways originate from the brainstem, traveling to effectors via cranial
nerves, or from sacral levels S2-S4 in the spinal cord.
-craniosacral division.
- What is dual innervation? - -when target effefctors receive innervation
from both the parasympathetic and sympathetic divisions.
- What determines the activity of the effector? - -Whichever innervation is
most active at a given
- What is the preganglionic neuron? - -The preganglionic neuron is the first
neuron in the pathway running from the spinal cord to the ganglion to
synapse with the second neuron.
- What is the postganglionic neuron? - -The postganglionic neuron is the
second neuron in the pathway, running from the ganglion to the effector.
- The sympathetic division:
-preganglionic axon length
-postganglionic axon length - --short preganglionic axon
System (Anatomy 337 UW Madison
Exam 2)
The nervous system can be divided into two functional parts. What are they?
- -the somatic nervous system and the autonomic nervous system.
- What does the somatic nervous system cause? - -The somatic nervous
system causes voluntary contraction of skeletal muscles
- What does the autonomic nervous system control? - -The autonomic
nervous system controls involuntary contraction of cardiac and smooth
muscle, as well as glandular tissue.
- In the autonomic nervous system, stimulation can either______ or ______the
effector. That means it can cause ______________. or _________ from a ________,
or it can ______ those actions from occurring. - -excite, inhibit, muscle
contraction, secretion, gland, prevent
- -How many lower motor neurons does the somatic nervous system have?
-Is there a synapse between neurons?
-Is ganglia present?
-Where does the lower motor neuron originate? - --just one lower motor
neuron
-Since there is only one neuron, there is no synapse
-no ganglia.
-That lower motor neuron originates in the ventral (anterior) horn of the
spinal cord.
- -How many lower motor neurons does the autonomic nervous system
have?
-Is there a synapse between neurons?
-Is ganglia present?
-Where does the lower motor neuron originate? - -- there are two neurons
-Yes
-The synapse between the two neurons occurs at a ganglion, or a collection
of cell bodies.
- The neurons that originate in the spinal cord begin in the lateral horn.
- In the somatic nervous system, are the lower motor neuron axons
myelinated?
, If so, what does this result in ? - -In the somatic nervous system, the lower
motor neuron axons are highly myelinated, allowing for a very rapid signal
transmission from the spinal cord to the effector.
- In the autonomic nervous system, are the lower motor neuron axons
myelinated?
If so, what does this result in ? - -In the autonomic nervous system, the
axons are either lightly myelinated (meaning a thin layer of myelin) or
unmyelinated, resulting in a slower conduction speed.
- What are the two divisions of the autonomic nervous system? - -the
sympathetic division and the parasympathetic division.
- What response is the sympathetic division associated with?
Where does its pathways originate?
What do they call it? - --The sympathetic division is associated with the
fight-or-flight response, preparing the body to respond to potentially
dangerous situations.
- the thoracic and first two lumbar levels of the spinal cord,
-"thoracolumbar division"
- What response is the parasymphateic division associated with?
Where does its pathways originate?
What do they call it? - -The parasympathetic division is associated with rest
and digest, conserving energy, replenishing energy stores, and conducting
routine maintenance.
-Its pathways originate from the brainstem, traveling to effectors via cranial
nerves, or from sacral levels S2-S4 in the spinal cord.
-craniosacral division.
- What is dual innervation? - -when target effefctors receive innervation
from both the parasympathetic and sympathetic divisions.
- What determines the activity of the effector? - -Whichever innervation is
most active at a given
- What is the preganglionic neuron? - -The preganglionic neuron is the first
neuron in the pathway running from the spinal cord to the ganglion to
synapse with the second neuron.
- What is the postganglionic neuron? - -The postganglionic neuron is the
second neuron in the pathway, running from the ganglion to the effector.
- The sympathetic division:
-preganglionic axon length
-postganglionic axon length - --short preganglionic axon
