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76 Cards in this Set
- Front
- Back
What tone is the predominant type in systemic circulation, parasympathetic or sympathetic?
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sympathetic
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What tone is the predominant type in the heart, parasympathetic or sympathetic?
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parasympathetic
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What tone is the predominant type in iris and ciliary muscle, parasympathetic or sympathetic?
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parasympathetic
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What tone is the predominant type in GI tract parasympathetic or sympathetic?
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parasympathetic
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What tone is the predominant type in the bladder parasympathetic or sympathetic?
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parasympathetic
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What tone is the predominant type in salivary glands, parasympathetic or sympathetic?
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parasympathetic
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What tone is the predominant type in sweat glands, parasympathetic or sympathetic?
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sympathetic
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What is the physiology behind myasthinia gravis?
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antibodies are blocking the nicotinic receptors at the neuromuscular junction.
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What can happen if you haev too much Ach in the NM junction for too long?
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depolorization block, paralysis of muscle
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How many ACh molecules must attach to a nicotinic receptor to activate it?
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2
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What kind of receptors are found in blood vessels, muscarinic or nicotinic?
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muscarinic
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What drug would you use for relaxing the larynx for intubation?
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succinylcholine, rocuronium can be substituted
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T/F Succinylcholine is a depolarizing neuromuscular blocker.
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true
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Macrophages have what type of ACH receptor? Stimulating these causes what reaction?
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nicotinic, anti inflammatory
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GIve an example of a false transmitter?
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Tyramine, Guanethidine=displaces stored NE
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How do tricyclic antidepressants work?
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by blocking uptake 1 which usually brings NE back into the presynaptic cleft
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Where do you find alpha-1 adrenergic receptors?
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in the vasculator
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Where do you find alpha-2 adrenergic receptors?
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presynaptic
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Where do you find beta-1 adrenergic receptors?
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heart
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Where do you find beta-2 adrenergic receptors?
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smooth muscle
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What receptors does norepinephrine stimulate? epinephrine?
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alpa-1, alpha-2, and beta-1
epinephrine stimulates all these and beta-2 |
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What receptor/s does dopamine bind and whats its effect (agonist/antagonist)?
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alpha-1 agonist, beta-1 agonist
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What receptor/s does phenylephrine bind and whats its effect (agonist/antagonist)?
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alpha-1 agonist
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What receptor/s does methoxamine bind and whats its effect (agonist/antagonist)?
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alpha-1 agonist
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What receptor/s does clondine bind and whats its effect (agonist/antagonist)?
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alpha-2 agonist
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What receptor/s does alpha-methyl-NE bind and whats its effect (agonist/antagonist)?
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alpha-2 agonist
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What receptor/s does oxymetazoline bind and whats its effect (agonist/antagonist)?
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alpha-1 and alpha-2 agonist
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What receptor/s does isoproterenol bind and whats its effect (agonist/antagonist)?
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beta-1 and beta-2 agonist
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What receptor/s does dobutamine bind and whats its effect (agonist/antagonist)?
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beta-1 agonist
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What receptor/s does terabutaline bind and whats its effect (agonist/antagonist)?
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beta-2 agonist
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What receptor/s does albuterol bind and whats its effect (agonist/antagonist)?
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beta-2 agonist
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What receptor/s does labetolol bind and whats its effect (agonist/antagonist)?
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beta-1 and beta-2 antagonist
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What receptor/s does phentolamine bind and whats its effect (agonist/antagonist)?
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alpha-1 and alpha-2 antagonist
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What receptor/s does phenoxybenzamine bind and whats its effect (agonist/antagonist)?
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alpha-1 and alpha-2 antagonist
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What receptor/s does prazosin bind and whats its effect (agonist/antagonist)?
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alpha-1 antagonist
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What receptor/s does yohimbine bind and whats its effect (agonist/antagonist)?
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alpha-2 antagonist
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What receptor/s does propranolol bind and whats its effect (agonist/antagonist)?
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beta-1 and beta-2 antagonist
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What receptor/s does timolol bind and whats its effect (agonist/antagonist)?
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beta-1 and beta-2 antagonist
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What receptor/s does nadolol bind and whats its effect (agonist/antagonist)?
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beta-1 and beta-2 antagonist
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What receptor/s does atenolol bind and whats its effect (agonist/antagonist)?
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beta-1 antagonist
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What receptor/s does butoxamine bind and whats its effect (agonist/antagonist)?
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beta-2 antagonist
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What receptor/s does metoprolol bind and whats its effect (agonist/antagonist)?
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beta-1 antagonist
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Will an alpha-1 agonist increase or decrease heart rate?
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decrease because it will vasoconstrict, giving a higher BP and activating baroreceptors
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Where do you find cGMP?
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vascular smooth muscle, intestinal mucosa
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How do methylxanthines work in relieving Asthma and COPD symptoms?
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inhibit cyclic nucleotide PDE 3 & 4, thereby preventing breakdown of cyclic AMP and cyclic GMP. PDE-3 is found in airway smooth muscle, PDE-4 involved in synthesis of inflammatory mediators
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What effect can PDE 5 inhibitors have on platelets?
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antagonizes platelet aggregation by inhibiting PDE-3
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On a very basic level, what do PDE inhibitors do?
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cGMP -------------->GMP
PDE by inhibiting PDE, more cGMP stays active |
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Your patient is hypokalemic. How will this effect the digoxin they are on?
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It will potentiate and cause increased digoxin effects.
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Your patients EKG shows a saw tooth pattern with multiple p-waves. whats he got?
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atrial flutter; anitcoagulants, digoxin, beta blockers, procainamide
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Your patients EKG shows no p-waves. whats he got?
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atrial fibrillation;
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What class is procainamide?
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IA
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What do class I antiarrhythmic drugs do?
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sodium channel blockade
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What do class IA antiarrhythmic drugs do? give an example
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block open Na channels, prolong AP duration, blocks K channels; quinidine, procainamide, disopyramide
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What do class IB antiarrhythmic drugs do? give an example
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prolong refractory period of NA channels; lidocaine
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What do class II antiarrhythmic drugs do? Give an example
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beta blockers; propranolol, esmolol, acebutolol, sotalol
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What do class III antiarrhythmic drugs do? Give an example.
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potassium channel blockers; Amiodarone, Bretylium, Ibutilide
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What is the mechanism and clinical application of sidenafil, varenadil, tadalafil?
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PDE-5 inhibitors, boners!!!! (they FIL your penis with blood)
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Name two examples of class IC antiarrhythmic drugs.
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flecainide, propafenone
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How is esmolol metabolized?
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RBCs
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How do you treat V-tach?
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Amiodarone and magnesium are the important ones according to the TA
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How do you treat ventricular fibrillation?
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defibrillation, cause you be screwed
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What part of the nephron do the most effective diuretics act at? give some examples.
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loop of henle; furosemide, bumetanide
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How will hypoalbuminemia affect loop diuretics?
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cause a decreased effect because albumin is necessary for organic anion secretion, so drugs reach kidney slower
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What kind of diuretics act on the proximal tubule? give an example
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carbonic anhydrase inhibitors; acetazolamide
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How does furosemide work in the ascending limb of the loop of Henle?
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inhibits Na+-K+-2Cl- cotransport by binding to chloride sites on transporter
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How does furosemide decrease pulmonary congestion?
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increased prostaglandin E2 synthesis
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Which aldosterone antagonist also blocks the Na-H exchanger?
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amiloride
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How does Dopamine and ANF affect bicarbonate re absorption?
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decreases bicarbonate re absorption
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What drug will give a relatively modest and self-limited diuresis? It has a sodium clearance level of 4%. where and how does this drug work?
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acetazolamide, inhibits carbonic anhydrase mostly in the proximal tubule
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How do thiazide diuretics work? where do they work?
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inhibiting the Na+-Cl- co transporter in the distal convoluted tubule
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What do K+ sparing diuretics act on? Name a direct antagonist in this drug category.
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aldosterone; spironolactone
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Name an indirect acting aldosterone antagonist and how it works.
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amiloride or triamterene work by blocking sodium channels in the luminal membrane of the distal tubule
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how do you calculate the volume of distribution?
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Vd=amount of drug in body/plasma drug concentration
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What are 3 important drugs that follow zero order kinetics?
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ethanol, aspirin, phenytoin
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How do you calculate half life?
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t1/2=(.693 x Vd)/CL
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_____ deals with teh effects of the body on the drug
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pharmacokinetics
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