NUR 210 EXAM 2|| ALL QUESTIONS AND CORRECT
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ANSWERS ALREADY GRADED A+|| ACTUAL EXAM n n n n n n
AND LATEST UPDATE 2024-
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2025 WITH VERIFIED SOLUTIONS|| ASSURED PASS
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What are the two main divisions of the nervous system?
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the CNS and the peripheral nervous system
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What does the CNS consist of?
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the brain and the spinal cord
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What does the peripheral nervous system consist of?
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somatic motor system and autonomic nervous system
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What does the somatic motor system control?
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voluntary movement of skeletal muscles
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what does the autonomic nervous system control?
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involuntary actions n
What are the two branches of the autonomic nervous system?
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parasympathetic (cholinergic) and sympathetic (adrenergic) n n n n
What is the nervous system in general responsible for?
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transmission of electric and chemical impulses
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What are the three principle functions of the autonomic nervous system?
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1. regulate the heart
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2. regulates secretory glands (gastric, sweat, and bronchial glands)
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3. regulates smooth muscle (bronchial passages, blood vessels, urogenital and GI trac
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t)
Describe the sympathetic response.
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"fight or flight", acute stress response
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what happens when you activate "fight or flight"?
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mobilize energy, HR and BP increase; shunt blood away from skin and viscera into s
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keletal muscles; bronchi dilated (improve oxygenation); pupils dilate (enhance visua
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l acuity); mobilize stored energy providing glucose for the brain and fatty acids for th
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e muscle
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What are adrenergic agents?
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medications that add energy n n n
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What are sympathomimetics?
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mimic the sympathetic nervous system
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Describe the parasympathetic response.
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"rest and digest"; HR slows; gastric secretion increases; emptying of bladder and bo
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wel; pupils constrict; bronchial smooth muscle contracts
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What are drug class examples for the parasympathetic response?
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cholinergic agents; parasympathomimetics n n
What are the three basic patterns of innervation and regulation for the sympathetic an
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d parasympathetic responses?
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1. have innervation of both divisions of the autonomic nervous system (effects of two
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divisions are opposed)
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ex. parasympathetic nerve slows HR and sympathetic nerve accelerates HR; both can
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be working at the same time
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2. innervation by both divisions of ANS and the effects are complimentary
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ex. in the male reproductive system the parasympathetic nerve regulates erection whi
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le sympathetic regulate ejaculation
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3. innervation and regulation by only one division
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ex. blood vessels regulated exclusively by sympathetic nerves
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What are the two basic types of receptors the peripheral nervous system works throug
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h?
1. adrenergic receptors: mediate responses to epinephrine (adrenaline) and norepinep
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hrine
2. cholinergic receptors: mediate responses to acetylcholine
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Describe adrenergic agents. n n
add energy; fight or flight
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What are the three receptor sub types affected by adrenergic agents?
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1. beta 1: cardiac
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2. beta 2: respiratory
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3. alpha: peripheral vascular; pupils
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What organs to adrenergic agents affect?
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cardiac: tachycardia n
respiratory: bronchial dilation n n
peripheral: vasoconstriction n
ocular: dilation (my/dri/asis - my/dry/eye)
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What do we use epinephrine for?
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