Neurologic system, ANS
Terms
undefined, object
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- part of the efferent division of the PNS (incl. some visceral afferent neurons) that maintains homeostasis
- autonomic nervous system (ANS)
- controls mobilization of energy stores in times of need
- sympathetic nervous system
- thoracolumbar (T1 - L2)division of nervous system
- sympathetic nervous system
- neurotransmitter secreted by most sympathetic fibers
- norepinephrine
- neurotransmitter secreted by most parasympathetic fibers
- acetylcholine
- organs innervated by ANS
-
eye (III, VII)
salivary glands (VII, IX, X)
heart
lungs
stomach
pancreas
liver/gall bladder
adrenals (sympathetic only)
bladder
genitals - cholinergic fibers release ___
- acetylcholine
- adrenergic fibers release ___
- norepinephrine
- catecholamines
-
epinephrine
norepinephrine
dopamine - types of adrenergic receptors
-
α1
α2
β1
β2
β3 - stim lypolysis - most α receptors are this type
- α1
- incr. HR/contractility, release renin
- β1
- adrenergic receptors stimulated by norepinephrine
-
α (esp. α1 - vasoconstriction)
β1 - adrenergic receptors stimulated by epinephrine
- all (esp. β - vasodilation)
- effect of β1
-
incr. HR/contractility
dilate coronary arterioles
stim. renin release - effect of β2
-
stim. insulin secretion
vasodilation
bronchodilation
relax GU, GI walls - effect of α1
-
vasoconstriction
constrict sphincters
dilate pupils
(all but heart) - effect of α2
- clotting
- mydriasis
- sympathetic
- miosis
- parasympathetic
- lacrimal gland stim
- parasympathetic
- salivary gland stim
- parasympathetic
- sweat gland stim
- sympathetic
- incr. HR/contractility
- sympathetic
- decr. HR/contractility
- parasympathetic
- skin/GI vasoconstriction
- sympathetic
- dilatess bronchial tubes
- sympathetic
- constricts bronchial tubes
- parasympathetic
- bronchial gland stim.
- parasympathetic
- inhibits GI motility/secretion
- sympathetic
- stim GI motility/secretion
- parasympathetic
- contracts GI sphincters
- sympathetic
- relaxes GI sphincters
- parasympathetic
- adrenal gland stim.
- sympathetic
- contracts bladder
- parasympathetic
- ejaculation
- sympathetic
- genital erection
- parasympathetic