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34 Cards in this Set
- Front
- Back
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major division of PNS
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ANS and SMS
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ANS major divisions
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Sympathetic NS Parasympathetic NS
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Relevant functions of Parasympathetic NS
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Slows HR, Increase Gastric secretion, , empty bladder and bowels, focus eyes for near, constricts puils, contracts bronchial SM
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principle functions of sympathetic NS
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regulation of CVS and BT, Initiate fight or flight.
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Ennervation of the heart
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sympathetic and paracympathetic with opposing effects
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ennervation Male sex organs
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sympathetic and paracympathetic with complimentary effects
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ennervation of blood vessels
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ANS only (sympathetic is dominant)
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Most systems with ANS ennervation
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Sympathetic is dominant.
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Pathway from spinal cord to organs under sympathetic and parasympathetic control
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a preganglionic neuron and a postganglionic neuron
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Adrenal medulla
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equivalent of a post ganglionic neuron
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somatic motor pathway from SC to muscle
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one neuron
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NT's of Peripheral NS
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Acetylcholine, NE, Epinephrine
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Acetylcholine released by
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1, all pre and post neurons of the Parasympathetic NS, 2. all pre and all post sweat of the sympathetic, 3. all motor neurons
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NE released by
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all post of the sympathetic NS, except to sweat glands
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Epinephrine
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major NT released by adrenal Medulla
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3 Major subtypes of Cholinergic receptors
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Nicotinic sub N, Nicotinic sub M, and Muscarinic
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4 Major subtypes of adrenergic receptors
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α1, α2, β1, β2
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Activation of Nicotinic sub N
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promotes transmission to all autonomic ganglia and release of Epi from Adrenal Medulla
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Activation of Nicotinic sub M
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contraction of skeletal muscle
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Activation of Muscarinic
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increase glandular secretion (pulmonary, gastric, intestinal, sweat), contract GI and bronchi SM, slow HR, contract iris, focus lense, dilate BV's, promote voiding
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Activation of α1
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contraction of radial muscle, veins and arterioles, ejaculation, SM of prostatic capsule
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Activation of α2
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minimal pharmacologic significance
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Activation of β1
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increase HR, contractility, AV conduction, and renin release
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Activation of β2
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dilate bronchi, relax uterine sM, increase glycogenolysis, enhance skeletal muscle contraction, dilate arteriles (heart, lungs, skeletal muscle)
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Activation of Dopamine receptors
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dilate BV of Kidney
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Termination at Cholinergic junctions
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acetylcholinesterase
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termination at adrenergic junctions
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reuptake of intact NE (then storage or monoamine oxidase
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Parasympathetic receptors are ?
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Muscarinic
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Sympathetic receptors are ?
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Adrenergic
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In most organ systems the parasympathetic system...
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provides the dominant tone
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the vascular system see what as the dominant system?
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sympathetic (this is the exception to the rule)
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Acetylcholine is secreted by all pre and post ganglionic neurons of the sympathetic and parasympathetic nervous systems with one caveat
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post ganglionic neurons of the sympathetic NS that go to sweat glands.
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NE released by all...
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post ganglionic neurons of the sympathetic NS
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NE is not secreted by
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post ganglionic neurons of the sympathetic NS
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