Pharmacology - Mock Test 42

Question 411

Atropine is contraindicated in

A) Pulmonary embolism B) Digitalis toxicity C) Iridocyclitis D) Raised intraocular tension

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Question 412

The most effective antidote for belladonna poisoning is

A) Neostigmine B) Physostigmine C) Pilocarpine D) Methacholine

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Question 413

Timolol eye drops are preferred over pilocarpine eye drops by glaucoma patients because

A) Timolol is more effective than pilocarpine B) Timolol acts by enhancing uveo-scleral outflow C) Timolol produces less ocular side effects D) There are no contraindications to timolol

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Question 414

The site of action of miotics for therapeutic effect in angle closure glaucoma is

A) Canal of Schlemm B) Ciliary body C) Ciliary muscle D) Sphincter pupillae muscle

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Question 415

Pilocarpine reduces intraocular tension in open angle glaucoma by

A) Contracting sphincter pupillae B) Increasing tone of ciliary muscle C) Reducing aqueous formation D) Enhancing uveo-scleral outflow

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Question 416

The mydriatic incapable of producing cycloplegia sufficient for refraction testing in children is

A) Atropine B) Hyoscine C) Homatropine D) Cyclopentolate

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Question 417

Which of the following is a relatively cerebroselective anticholinesterase found to afford symptomatic improvement in Alzheimer's disease

A) Donepezil B) Gemfibrozil C) Pyridostigmine D) Pyritinol

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Question 418

Edrophonium is more suitable for differentiating myasthenic crisis from cholinergic crisis because of its

A) Shorter duration of action B) Longer duration of action C) Direct action on muscle end-plate D) Selective inhibition of true cholinesterase

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Question 419

The most suitable mydriatic for a patient of corneal ulcer is

A) Atropine sulfate B) Homatropine C) Cyclopentolate D) Tropicamide

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Question 420

The mechanism by which neostigmine improves contraction of myasthenic muscle involves

A) Repetitive binding of the acetylcholine molecules to the same receptors at the muscle endplate B) Diffusion of acetylcholine released from motor nerve endings to a wider area activating neighbouring receptors C) Activation of motor end-plate receptors by neostigmine molecules themselves D) All of the above

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