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27 Cards in this Set
- Front
- Back
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General function and role of PNS
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Afferent sensory function and efferent motor function of the somatic and autonomic systems by sending the signals to the CNS where a response can be made
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Function of the Autonomic Nervous System
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Regulates, adjusts, and coordinates visceral functions: blood pressure and blood flow, body temperature, respiration, digestion, metabolism, elimination
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What are the divisions of the Autonomic Nervous System
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Sympathetic and Parasympathetic
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What are the functions of the Sympathetic division
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maintains vital functions, responds when there is a critical threat to the integrity - the "fight-or-flight" response, motor/sensory
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What are the functions of the Parasympathetic division
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concerned with conservation of energy, resource replenishment, maintenace or organ function during inactivity, sensory/motor, if sympathetic is "fight or flight", then what is parasympathetic
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What is Norepinephrine and Epinephrine
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-Neurotransmitters for the sympathetic postganglionic neurons
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What is Acetylcholine
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-neurotransmitter for preganglionic neurons for both ANS division and neurotransmitter for the postganglionic neurons of the parasympathetic nervous system
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What is the vasovagal response
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a paradoxical increase in parasympathetic activity and decrease in sympathetic activity resulting in bradycardia and vasodilation (triggered by stress, pain, fear, or increase in intraabdominal or intrathoracic pressure
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How is sensory function began
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it begins with transmission of sensory signals with activation of specialized dendritic processes, sensory receptors, at the ends of sensory afferent that project to the spinal cord -Then secondary neurons in the cord are activated and carry the signals up the cord to the brain - Which then makes the thalamus relay signals to various brain areas, including the somatosensory cortex in the parietal lobe
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What is the most common cause of syncope
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the Vasovagal response where blood pressure decreases dramatically
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What does Crainial Nerve III control
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It is the oculomotor crainial nerve that controls eyelid and eyeball muscles
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What does Crainial Nerve VII control
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Called the Facial Nerve controls Sensory: taste Motor: facial muscles and salivary glands
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What does Crainial Nerve IX control
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Called the Glossopharyngeal Nerve controls Sensory: Taste Motor: Swallowing
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What does Crainial Nerve X control
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Called the Vagus Nerve and it is the main nerve of the parasympathetic nervous system having both sensory and motor capabilities
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What is the normal role of muscarinic receptors
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Slows Heart Rate, Increases gastric secretions, Emptys bladder and bowel, Focuses eyes for near vision, constricts pupils, contracts bronchial smooth muscle, erection in men, increases saliva,
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What is the role of muscarinic agonists
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they stimulate the normal functions of the muscarinic receptors
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What is the role of nicotinic receptors
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Paralysis for anethesia (SUCCINYLCHONLINE), sleep, anxiety, processing pain, cognitive function, chemical warfare
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What are the receptors that branch off the adrenergic (from the sympathetic nervous system)
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Dopamine, Alpha 1&2, Beta 1 and Beta 2
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What is the role of Dopamine Receptor
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Recieves dopamine only and it dilates the renal blood vessels
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What is the role of Alpha 1 & 2 receptor
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Vasoconstriction, ejaculation, contration of the bladder neck and prostate, increased sweating
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What is the Role of Beta 1
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Increases HR, Contractile force, conduction of AV node, renin release (Kidney)
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What is the role of Beta 2
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Bronchodialation, relaxation of the uterine muscle, vasodilation in the skeleton muscle, glygogenolisis, relaxes GI smooth muscle walls, relaxes the detrusor muscle
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What is Dopamine's receptor specificity
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LOW DOSE : dopamine receptors MODERATE DOSE: dopamine and beta 1 receptors VERY HIGH DOSE: Alpha1, Beta 1 and dopamine receptors
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What are the adverse effects of beta-adrenergic antagonists II
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-bradycardia -AV heart block -Heart failure -rebound cardiac excitation -Inhibition of glycogenolysis -bronchoconstriction
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How does Norepinephrine work
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by activating alpha1/2 and Beta 1
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How does Epinephrine work
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by activating alpha 1/2 and Beta 1/2
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How does Dopamine work
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Activation of peripheral dopamine receptors (dilates vasculature of kidney allowing increased blood flow in kidney failure)
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