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63 Cards in this Set
- Front
- Back
parasympathetics- location and where do they synapse?
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cranial and sacral and synapse near or on target organ
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sympathetics originate? synpase?
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thoraci and lumbar and synpase around spinal cord
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what are catecholamines
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NE and Epi
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what is the rate limiting step in catecholamin synthesis
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tyrosine hydroxylase( tyrosine to dopa)
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Ach and M1 and M2 receptors work in what way-
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Gq- phospholipase C
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Ach and M2 work in what way?
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Gi= inhibition of adenylyl cyclase
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what does M3 do?
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releases NO for smooth muscle relaxation
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alpha 1 receptors are pre or post junctional
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post junctional
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what do alpha-1 receptors do
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vasoconstriction, GI relaxation, mydriasis,
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what do alpha 2 receptors do
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inhibition of release of NE and EPI, inhibition of insulin release and inhibituon of lipolysis
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what catecholamines do alpha receptors work with
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epinephrine=NE>isoproterenol
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alpha 1 receptors with M1 and M3 work with hat G protein?
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Gq
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alpha 2 receptors with M2 work with what receptor
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Gi
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Beta 1 receptors do what
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increased contractility and coduction velocity and renin secretion
react with isoproterenol>EPI= NE |
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B2 receptors do what
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mediate vasodilaton and intestinal,bronchial, uterine smooth muscle relaxation
react with isoproterenol= epinephrine> norepinephrine |
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B work with what G protein?
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Gs
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direct acting muscarinic cholinoreptor agonists act like what?
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parasympatheticmimetics
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what do muscarinics do to eyes
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contract circular smooth muscle of cilliary muscle to decrease intracular pressure and miosis by contracting iris sphincter (tiny pupils)
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what do muscarinics do for CV system
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negative ionotropic effect, decreases conduction velocity at AV node, vasodilation and increases NO for relaxation of smooth muscle and perhaps reflex tachycardia
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pilocarpine, bethanechol, carbechol
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muscarinics!
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muscarinics do what to bladder?
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relax sphnicter and contract ureter and bladder
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muscarinic on respiratory system=
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bronchoconstriction
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bethanecol
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prevents urinary retension
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methacholine
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used for methacholine challlenge for asthma
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pilocarpine- used for
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glaucoma, sjogren syndrome
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contraindcated in astrhma, parkinsons, peptic ulcer, cardiac dz
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muscarinics
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edrophonium, neostigmine, physostigmine, echothiophate, isoflurophate
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indirect acting parasympathomimetics
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indirecting parasympathomimetics MOA
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inhibit AchE and increase Ach
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neostigmine or physostigmine enters CNS?
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physostigmine
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what will reverse the AchE inhibitors?
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pralidoxime (2PAM)
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AchE inhibitors are used for what diseases?
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glaucoma, myasthenia gravis, alzheimers, atropin poisoning
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adverse effects of AchE inhibiters
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muscle weakness, cramps, fasculations, bronchial secretions, coma, CV collapse, respiratory failure
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poisoned with organophosphates by the biscuit farmer from quelf...whats the antidote?
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atropine and pralidoxime (2PAM)
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atropine, scopolamine, propantheline, trimethaphan, cisatracurium, succinylcholine
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muscarinic receptor antagonists
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what do anti muscarinics do to eye, CV, GI, lung?
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cycloplegia, mydriasis, increased HR, decreased salvation, reduce peristalsis, bronchodilate and anhidrosis
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muscarinic antagonists treat
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urinary urgency, parkinsons, asthma, COPD
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adverse effects of muscarinic blockers-
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mydriasis, dry eyes, dry mouth, dry skin, temp, delirum- "hot as a hare, dry as a bone, red as a beet and mase and a hatter, blind as a bat"
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the curiums- cisatracurium, mivacurium, doxacurium, pancrurium, vecurium
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skeletal muscle relaxants nondepolarizing
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in surgery and you gave too much of a curium- muscle relaxant how can you fix this?
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neostigmine
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the only depolarizing skeletal relaxant
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succinylcholine
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side effects of succinylcholine
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hyperkalemia, malignant hyperthermia, bradycardia, increased intraocular pressure
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tx of malignant hyperthermia
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dantrolene
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benzodiazepines MOA
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GABA
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epinephrine activates what receptors
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B1, b2 and alpha 1 receptors
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NE works at what receptors-
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B1 and alpha receptors
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epinephrine decreases total peripheral resistance and diastolic pressure why?
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Beta 2 receptors!
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what happens to dopamine at low and high doses?
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low doses= increased systolic pressure and positive ionotropic
high doses= vasoconstriction and activates alpha receptors and reflex decrease in heart rate |
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dobutamine works at what receptor
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B1
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terbutaline, albuterol, metaproterenol, salmeterol, bitolterol, levalbuterol, pirbuterol
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B2 agonists
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isoproterenol
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B agonist and little bit alpha
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phenylephrine, methoxamine, metaraminol
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alpha 1 agonist
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chlonidine, methyldopa, uanabenz, guanfacine
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alpha 2 agonists
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what do you use in shock?
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low doses of dobutamine or dopamine
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whats used for CHF
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dobutamine
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phentolamine, prazosin, labatelol, phenoxybenzamine
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alpha antagonists
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alpha blockers used for
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pheochromocytoma, hypertension, raynads and erectile dysfunction
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propanolol, metoprolol, betaxolol, bisoprolol, atenolol, acebutolol, esmolol,
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B blockers
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labetolol and carvedilol
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alpha and B blockers
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timolol, levobunolol, nadolol, sotalol,
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nonselective B anatgonists
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sotalol use
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arrythmias
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pindolol, cartelol, penbutolol
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non selective antagnosist with partial B2 agonist activity
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B blocker uses
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hypertension
MI atrial andventricular arrythmias angina obstructive cardiomyopathy glaucoma hyperthyroidism migarine prophylaxis |
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dont use B blockers in
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asthmatics, be careful in diabetics and heart failure patients
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