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16 Cards in this Set
- Front
- Back
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Nervous System
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Brain
Spinal Cord |
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Peripheral Nervous System
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Somatic Motor
Autonomic Nervous System Sympathetic Parasympathetic |
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Synaptic Transmission
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Makes (Synthesizes)
Stores Releases Binds ( Receptor) Ends (Terminates) |
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Adrenergic receptors
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Mediated by:
norepinephrine epinephrine dopamine |
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Sympathetic Nervous System
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Fight or Flight
Pupil dilation Tracheal and bronchial dilation Relax uterus Contract bladder sphincter Stimulates ejaculation Increases heart and contractility Contracts GI sphincters, decreases motility Constricts most blood vessels Dilates vessels to skeletal muscle |
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Sympathetic Nervous System (Adrenergic)
Alpha 1 receptors |
Blood vessels –constrict
GI sphincter – contract Bladder sphincter-contract Uterus – contract Penis -ejaculate |
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Sympathetic Nervous System (Adrenergic)
Alpha 2 receptors |
presynaptic
CNS stimulation Vasoconstriction Less clinically significant |
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Sympathetic Nervous System (Adrenergic)
Beta 1 receptors |
Cardiac muscle-increase contractility
Atrioventricular node (AV) - increase heart rate Sinoatrial node (SA) – increase heart rate |
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Sympathetic Nervous System (Adrenergic)
Beta 2 receptors |
Blood vessels – dilation
GI muscles – decreased motility Uterus – relaxation Bronchial muscles – dilation Glycogenolysis |
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Stimulation of Alpha-1 Receptors
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Stimulation causes:
Vasoconstriction Increased peripheral resistance Increased blood pressure (BP) Pupil dilation (mydriasis) Closure of the internal sphincter of the bladder |
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Stimulation of Alpha-2 Receptors
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Causes:
Decreased release of NE, reducing sympathetic outflow from brain Vasodilation |
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Stimulation of Beta-1 Receptors
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Causes:
Tachycardia Increased myocardial contractility Increased lipolysis |
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Stimulation of Beta-2 Receptors
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Causes:
Bronchodilation Vasodilation Slightly decreased peripheral resistance Increased muscle and liver glycolysis Increased release of glucagon Relaxation of uterine smooth muscle |
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Cholinergic Receptors
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Mediated by:
Acetylcholine - pre and post ganglionic neurotransmitter |
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Cholinergic Receptors
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Nicotinic n (neuronal)
Promotes ganglia transmission Promotes release of epinephrine Nicotinic m (muscle) Contraction of skeletal muscle Muscarinic Activate parasympathetic nervous system in heart smooth muscle and xocrine glands |
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Parasympathetic Nervous System (PNS)
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The regulatory functions of PNS affect these sites
Heart rate-slows Gastric secretions-increases Bladder and bowel - stimulates Vision- constricts Bronchial smooth muscle-constricts |
