Study Set Content:
• Concerned primarily with visceral functions such as cardiac output, blood flow to various organs, and digestion, which are necessary for life.
AUTONOMIC NERVOUS SYSTEM (ANS)
Both systems have important (blank) inputs that provide information regarding the internal and external environments and modify motor output through reflex arcs of varying size and complexity.
afferent (sensory)
In the nervous system, chemical transmission occurs between (blank) and between (blank) and their (blank)
nerve cells effector cells.
takes place through the release of small amounts of transmitter substances from the nerve terminals into the synaptic cleft.
Chemical transmission
The transmitter crosses the cleft by
diffusion
The transmitter crosses the cleft by diffusion and activates or inhibits the postsynaptic cell by binding to a specialized
receptor molecule
The ANS lends itself to division on anatomic grounds into two major portions:
Sympathetic
Parasympathetic
Sympathetic or
(thoracolumbar)
Parasympathetic (traditionally
“craniosacral,
Neurons in both divisions originate in nuclei within the (blank) and give rise to preganglionic efferent fibers that exit from the brain stem or spinal cord and terminate in (blank)
CNS, motor ganglia
The first nerve cells is known as the (blank) and its cell body is located within the CNS
preganglionic neuron
This preganglionic neuron emerged from the brainstem or the spinal cord and makes a (blank) in the ganglia.
synaptic connection
This ganglia functions as a (blank) between a preganglionic and the second nerve cell the post ganglionic
relay stations
• The sympathetic preganglionic fibers leave the CNS through the .
thoracic, lumbar, and (according to new information) sacral spinal nerves
Preganglionic neurons are (blank) in comparison to the post ganglionic ones
short
Preganglionic neurons are short in comparison to the post ganglionic ones and axons of the post ganglionic neurons extends from this (blank) tissues that they enervate and regulate.
“ganglionated”
The sympathetic nervous system is also called the(blank) from the thoracic and lumbar nerves
thoracolumbar region
The parasympathetic preganglionic fibers leave the CNS through the cranial nerves (especially the
e third, seventh, ninth, and tenth)
The parasympathetic preganglionic fibers leave the CNS through the cranial nerves (especially the third, seventh, ninth, and tenth) and the (blank) sacral spinal nerve roots
third and fourth
Cranial Nerve III
oculomotor nerve
