|
Because the ANS is a visceral motor system, afferent pathways are of no importance and actually are rarely found. |
FALSE |
|
The rami communicantes are associated only with the sympathetic division of the ANS. |
TRUE |
|
The gray rami communicantes consist of myelinated postganglionic fibers. |
FALSE |
|
Splanchnic nerves are mixed motor and sensory nerves. |
FALSE |
|
The autonomic nervous system may cause activation or inhibition, depending on the division that is active and the target that is affected. |
TRUE |
|
The celiac ganglion is primarily associated with the sympathetic division. |
TRUE |
|
The sympathetic chain is composed of collateral ganglia. |
TRUE |
|
Thermoregulatory responses to increased heat are mediated by the sympathetic nervous division. |
TRUE |
|
Most disorders of the autonomic nervous system reflect abnormalities of smooth muscle control. |
TRUE |
|
Alpha-adrenergic effects are usually stimulatory and mediatory. |
TRUE |
|
The adrenal medulla is considered a "misplaced" sympathetic ganglion by some. |
TRUE |
|
Acetylcholine is the substance released by the axonal endings of the somatic efferent fibers and by the parasympathetic nerve fiber endings. |
TRUE |
|
Most body organs are innervated by only the sympathetic division of the nervous system. |
FALSE |
|
Through direct neural stimulation, the sympathetic division promotes many metabolic effects via hormone release. |
TRUE |
|
Cranial nerves VII, IX, and X contain postganglionic fibers of the parasympathetic nervous system. |
FALSE |
|
The ANS stimulates smooth and skeletal muscles and glands, whereas the somatic nervous system innervates cardiac muscles only. |
FALSE |
|
Norepinephrine-releasing fibers are called cholinergic fibers. |
FALSE |
|
Autonomic ganglia are motor ganglia only. |
TRUE |
|
The craniosacral division is another name for the parasympathetic division. |
TRUE |
|
The chain ganglion, like the dorsal root ganglion, contains soma from sensory neurons. |
FALSE |
|
Most blood vessels are innervated by the sympathetic division alone. |
TRUE |
|
The blood vessels of the skin are one of the few areas of the body where the vessels are innervated by both the sympathetic and parasympathetic divisions. |
FALSE |
|
Events recorded in a lie detector examination are controlled by the sympathetic division. |
TRUE |
|
All splanchnic nerves are sympathetic. |
FALSE |
|
Splanchnic nerves pass through the abdominal aortic plexus. |
TRUE |
|
The structures that specifically exhibit vasomotor tone are mostly under sympathetic control. |
TRUE |
|
Because many of the same cardiac cells are innervated by both parasympathetic and sympathetic fibers, the influence of the two divisions on the heart is synergistic. |
FALSE |
|
β-adrenergic receptors are the only receptors found on the heart. |
FALSE |
|
Autonomic reflex centers occur in the spinal cord, medulla, and midbrain. |
TRUE |
|
Cranial nerves III, VII, and IX supply the entire parasympathetic innervation of the head; however, only the preganglionic fibers lie within these three pairs of cranial nerves. |
TRUE |
|
Because parasympathetic fibers never run in spinal nerves, rami communicantes are associated only with the sympathetic division. |
TRUE |
|
Rami communicantes are designated white or grey to indicate whether or not the fibers passing through them are myelinated. |
TRUE |
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