B IO 205: Autonom ic Ner vous
System Questions and answ er s
w ith accur ate
r ationales(PASSED)
Define the autonomic system - answer is the system of motor neurons that
innervates smooth muscle, cardiac muscle, and glands
What are the two divisions of the autonomic nervous system? - answer the
sympathetic and parasympathetic nervous system
How does the somatic and autonomic NS differ? - answer 1. Different effectors
-somatic: skeletal muscles (controls voluntary movements)
-autonomic: cardiac, smooth, and glands (controls involuntary)
2. Different neurotransmitter effects on targets
-SNS: excitatory only (can only stimulate)
-ANS: excitatory and inhibitory (depending on the receptor type)
How does the SNS and ANS differ with their effectors? - answer somatic NS:
voluntary control of skeletal muscles
autonomic NS: involuntary control of cardiac and smooth muscles, and glands
, How does the SNS and ANS differ in neurotransmitter effects on targets? - answer
somatic: excitatory ONLY
autonomic: excitatory and inhibitory (depending on receptor type)
What 3 ways are ANS and SNS different? - answer 1. Different effectors
2. Different neurotransmitters effects on the target
3. different efferent pathways and ganglia
How does the SNS and ANS differ in their efferent pathways and ganglia? - answer
SNS: has a single neuron from the CNS to effector (lower motor neuron)
ANS: has two neurons from CNS to effector (pre and post ganglionic neurons)
What are the two signaling neurons in the ANS? - answer preganglionic and
postganglionic neurons
Describe the characteristics of the preganglionic neuron in the ANS - answer 1.
Cell body is in the lateral gray horn
2. lightly mylinated preganglionic fibers that exit the SC via the ventral root
(motor)
3. preganglionic fibers terminate in the autonomic ganglion
Describe the characteristics of the postganglionic neuron in the ANS - answer 1.
cell body is in the autonomic ganglion
2. contains unmylinated post-ganglionic fibers exits the autonomic ganglion
3. postganglionic neurons terminates at the effector
System Questions and answ er s
w ith accur ate
r ationales(PASSED)
Define the autonomic system - answer is the system of motor neurons that
innervates smooth muscle, cardiac muscle, and glands
What are the two divisions of the autonomic nervous system? - answer the
sympathetic and parasympathetic nervous system
How does the somatic and autonomic NS differ? - answer 1. Different effectors
-somatic: skeletal muscles (controls voluntary movements)
-autonomic: cardiac, smooth, and glands (controls involuntary)
2. Different neurotransmitter effects on targets
-SNS: excitatory only (can only stimulate)
-ANS: excitatory and inhibitory (depending on the receptor type)
How does the SNS and ANS differ with their effectors? - answer somatic NS:
voluntary control of skeletal muscles
autonomic NS: involuntary control of cardiac and smooth muscles, and glands
, How does the SNS and ANS differ in neurotransmitter effects on targets? - answer
somatic: excitatory ONLY
autonomic: excitatory and inhibitory (depending on receptor type)
What 3 ways are ANS and SNS different? - answer 1. Different effectors
2. Different neurotransmitters effects on the target
3. different efferent pathways and ganglia
How does the SNS and ANS differ in their efferent pathways and ganglia? - answer
SNS: has a single neuron from the CNS to effector (lower motor neuron)
ANS: has two neurons from CNS to effector (pre and post ganglionic neurons)
What are the two signaling neurons in the ANS? - answer preganglionic and
postganglionic neurons
Describe the characteristics of the preganglionic neuron in the ANS - answer 1.
Cell body is in the lateral gray horn
2. lightly mylinated preganglionic fibers that exit the SC via the ventral root
(motor)
3. preganglionic fibers terminate in the autonomic ganglion
Describe the characteristics of the postganglionic neuron in the ANS - answer 1.
cell body is in the autonomic ganglion
2. contains unmylinated post-ganglionic fibers exits the autonomic ganglion
3. postganglionic neurons terminates at the effector
