Created by Terri Street for OKTechMasters © 2000 Adapted by Tom Gest, Anatomical Sciences, University of Michigan Medical School, 2004 Questions developed by Charisa Roy, University of Michigan Medical School Class of 2007

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A. voluntary actions C. pain sensory signals B. some reflexes D. homeostasis Which of the following does NOT involve the somatic nervous system?

B. some reflexes D. homeostasis Which of the following does NOT involve the somatic nervous system?

Back to Board The somatic nervous system mediates voluntary actions, while the autonomic nervous system maintains homeostasis.

A. sympathetic C. sympathetic & parasympathetic B. parasympathetic D. central nervous system Maintaining blood pressure is a job of which division of the autonomic nervous system?

C. sympathetic & parasympathetic B. parasympathetic Maintaining blood pressure is a job of which division of the autonomic nervous system?

Back to Board Blood pressure is regulated by the interplay of the sympathetic and parasympathetic nervous systems.

A. autonomic C. autonomic & somatic B. somatic D. entire CNS Effector organs are organs innervated by which part of the nervous system?

A. autonomicB. somatic Effector organs are organs innervated by which part of the nervous system?

Back to Board Organs innervated by the autonomic nervous system are called effector organs.

A. prevertebral ganglia C. sympathetic chain B. paravertebral ganglia D. lateral horn (T1-L2) The cell bodies of the presynaptic sympathetic neurons can be found in which of the following structures?

C. sympathetic chain D. lateral horn (T1-L2) The cell bodies of the presynaptic sympathetic neurons can be found in which of the following structures?

Back to Board All presynaptic sympathetic nerve cell bodies lie in the lateral horn of the spinal cord between spinal cord levels T1 to L2.

A. interganglionic rami C. gray rami communicantes B. white rami communicantes D. segmental rami What type of rami are only found between spinal segments T1-L2?

C. gray rami communicantes B. white rami communicantes What type of rami are only found between spinal segments T1-L2?

Back to Board Gray rami communicantes reach every spinal nerve, but white rami communicantes are only found between T1 and L2.

A. spinal column C. lateral horn B. sympathetic chain D. cervical plexus Presynaptic sympathetic fibers have the option of passing through or synapsing at ganglia anywhere within what structure?

C. lateral horn B. sympathetic chain Presynaptic sympathetic fibers have the option of passing through or synapsing at ganglia anywhere within what structure?

Back to Board Presynaptic sympathetic fibers can either synapse in the sympathetic chain or in preaortic ganglia in the abdomen (or the suprarenal medulla).

A. interganglionic rami C. gray rami communicans B. white rami communicans D. sympathetic chain A postsynaptic sympathetic fiber can re-enter a spinal nerve via what structure?

A. interganglionic rami C. gray rami communicans A postsynaptic sympathetic fiber can re-enter a spinal nerve via what structure?

Back to Board Gray rami communicantes carry postsynaptic sympathetic fibers to every spinal nerve (or more properly, the ventral primary ramus of every spinal nerve).

A. spinal nerves C. ventral rootlets B. dorsal rootlets D. rami communicantes All presynaptic sympathetic fibers leave the spinal cord via what structures?

C. ventral rootlets D. rami communicantes All presynaptic sympathetic fibers leave the spinal cord via what structures?

Back to Board Because presynaptic sympathetic fibers are motor fibers, they leave the spinal cord in the ventral rootlets (of T1 to L2).

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