Pharmachology cholinergic antagonist practice test [The beautiful thing about learning is that no one can take it away from you] shema published on November 11, 201212 responses 0 « Previous Next » Questions in vertical order 1/19 which is true about trimethaphan? Hint: 1 choice used in emergency to decrease BP used in emergency to increase BP not helpful in BP 2/19 therapeutic uses of atropine? opthalmic: mydriasis and cycloplegia antispasmodic: relax GIT antidote for cholenergic agonist antisecratory 3/19 which of the followings are true about ipratropium? useful in treatment of asthma who are unable to take adrenergic agonist in COPD its inhaled because of its '+' charges it can't enter systemic circulatin or CNS 4/19 which of the followings are true about ganglionic blockers? act on nicotonic receptors of both parasympathetic and sympathetic autonomic ganglia some block ion channels of autonomic ganglia block entire outcome of ANS at nicotinic receptor ganglionic blockers are rarely used for therapeutic purpose 5/19 which is not true about mecamylamine? competitive nicotinic blockage of ganglia oral administeration all of the above are wrong 6/19 which of the following drugs are antimuscarinic agents? Hint: 5 choices scopolamine tropicamide mecamylamine cyclopentolate atropine ipratropium 7/19 action of atropine? Hint: 3 choices low dose: CO decrease result in bradycardia b/c of blockage of M1 receptor high dose: CO increase rsult in tachycardia b/c of blockage of M2 receptor arterial BP is unaffected all of the above are wrong 8/19 which of the followings are wrong about tropicamide and cyclopentolate? actions used as opthalmic (mydriasis and cycloplegia) duration shorter than atropine actions used as opthalmic ( miosis) 9/19 which drug helps in atropine toxicity? Hint: 1 choice physostigamine bethanechol pilocarpine 10/19 which of the following is true about atropine? Hint: 3 choices in patients with narrow angle glaucoma gastric motility is reduced but production of HCl is not affected that is y the drug is not effective in peptic ulcer useful in gastriac ulcer block cholinergic activity results in percistant mydriasis(dilation of eye), unresponsiveness to light and cycloplegia 11/19 which of the following agents cholinergic antagonists have? antimuscarinic agents ganglionic blockers neuromuscular blockers 12/19 which of the following drugs are ganglionic blockers? Hint: 2 choices mecamylamine atropine nicotine 13/19 theraputic use of scopolamine? Hint: 2 choices prevent motion sickness stimulate secretion blocking short term memory 14/19 which of the followings are true of scopolamine? most effective, anti motion sickness unusual efect of blocking short term memory higher does: produce sedation produce euphoria and subject to abuse 15/19 in older patients atropine? induce mydriasis and cycloplegia may induce urinery retention children are sensitive to atropine 16/19 which of the followings are not true about nicotine? depolarize autonomic ganglia resulting first in stimulation and then paralysis of all ganglia people use it for stoping cigratte smoking increases,BP,cardiac rate, peristalsis,secretions at higher does decrease BP GIT and bladder at higher does it increases BP 17/19 which is not true about atropine? Hint: 1 choice block secretions: causes xerostomia stimulate secretion adverse effects: dry mouth blurred vison tachy cardia constipation 18/19 anti muscranic agents? Hint: 3 choices block muscranic synapses of parasympathetic nerves doesnt block symathetic nerves except those of sweat and salivary glands have little or no action at skeletal neuromuscular juntion or autonomic ganglia doesnt block muscranic synapses of parasympathetic nerves 19/19 which is wrong about pharmacokinetics of atropine? partially metabolized by liver eliminated primarily in urine partially metabolized by intestines
