Lecture 12. Autonomic Nervous System

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sympathetic system colloquially referred to as

"fight or flight"

parasympathetic system called

"rest and digest" or "feed and breed"

What is only innervated by sympathetic division?

-arterioles -adrenal medulla -sweat glands -arrector pili

what does the ANS act on?

-blood vessels, glands, smooth muscle, cardiac muscle -generally speaking, organs are innervated by both sympathetic and parasympathetic divisions -in a normal animal, these two divisions are in balance

What is only innervated by parasympathetic division?

-ciliary m. -lacrimal gland

autonomic nervous system (ANS)

-not under voluntary control -instead it is regulated by the hypothalamus and reticular formation, which both have connections to autonomic nuclei in the brainstem and spinal cord

ANS subdivisions?

-sympathetic and parasympathetic nervous systems

What type nervous system is the ANS?

visceral efferent (viscera motor, GVE)


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