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25 Cards in this Set
- Front
- Back
central nervous system center that exerts the most direct control over the autonomic nervous system |
brain stem |
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when a person is subjected to a cold environment how does the ANS respond |
sympathetic system responds by vasoconstriction of blood vessels of the PNS |
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describe the organization of the PNS |
autonomic system consists of two divisions, sympathetic and parasympathetic |
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characteristic of the sympathetic nervous system |
causes a dry mouth |
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how does the parasympathetic system affect the eyes |
contracts the ciliary muscle and constricts the pupil |
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cause of orthostatic hypotension |
slower response of the sympathetic vasoconstrictors in the elderly |
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why does a person suffering from a heart attack have cold clammy skin |
sympathetic response has constricted blood vessels |
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characteristic of the parasympathetic nervous system |
increases digestive activity |
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organs exhibit parasympathetic tone |
heart, digestive, and urinary organs |
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where do preganglionic fibers of the sympathetic system arise |
lateral horns from the thoracic region down to the second lumbar region of the spinal cord |
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nerves account for the majority of the preganglionic fibers of the parasympathetic system |
vagus nerves |
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most likely explanation for hypertension |
overactive sympathetic vasoconstrictor response |
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which of the following describes the somatic nervous system |
its target organs are skeletal muscles |
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which of the following is a parasympathetic response |
secretion of acetylcholine |
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which of the following is characteristic of the autonomic nervous system |
it has one ganglia in each motor unit located outside the CNS |
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describe the anatomy of the parasympathetic fibers |
terminal ganglia that are close to the effectors |
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term for a double row of ganglia on either side of the vertebra that allows axons to ascend or descend to a different ganglion in the chain |
sympathetic chain |
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cerebrum may have influence over what autonomic function |
awareness through biofeedback training |
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characteristic of most homeostatic imbalances of the autonomic nervous system |
lack of smooth muscle control |
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parasympathetic control of the heart is served by which nerves
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vagus and cardiac plexu |
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what is an autonomic nervous system function controlled by the hypothalamus |
blood pressure |
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what is a cholinergic fiber |
it has fibers that release acetycholine |
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describe the anatomy of sympathetic fibers |
have ganglia that are close to the CNS |
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describe nicotinic receptors |
they are always stimulatory |
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effect of the ANS on lung function |
parasympathetic system constricts the bronchioles |