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Question 1
How does atropine produce its effects?
- It competitively binds to muscarinic receptors and prevents acetylcholine binding
- It blocks nicotinic receptors at the neuromuscular junction
- It activates muscarinic receptors directly
- It inhibits acetylcholinesterase
Question 2
Which drug is a naturally occurring alkaloid that directly stimulates muscarinic receptors?
- Pilocarpine
- Bethanechol
- Carbachol
- Neostigmine
Question 3
Which pair are examples of choline esters used as direct-acting parasympathomimetics?
- Carbachol and bethanechol
- Pilocarpine and physostigmine
- Neostigmine and pyridostigmine
- Parathion and echothiophate
Question 4
Which of the following are clinical applications of pilocarpine?
- Emergency glaucoma, xerostomia, and reversal of atropine-induced mydriasis
- Myasthenia gravis, tubocurarine reversal, and organophosphate toxicity
- Chronic open-angle glaucoma, cataract prevention, and insecticide exposure
- Hypertension, diarrhea, and urinary retention
Question 5
Pilocarpine can lower intraocular pressure in both narrow-angle and open-angle emergency glaucoma.
- True
- False
Question 6
Which drug is used for symptomatic treatment of myasthenia gravis?
- Neostigmine
- Pilocarpine
- Atropine
- Pralidoxime
Question 7
Physostigmine, not neostigmine, is used to overcome atropine toxicity.
- True
- False
Question 8
Which drugs are preferred for chronic management of myasthenia gravis because they are longer acting?
- Ambenonium and pyridostigmine
- Neostigmine and physostigmine
- Atropine and pralidoxime
- Echothiophate and parathion
Question 9
Which carbamate was replaced by other drugs because it is hepatotoxic?
Fill in the blank
Question 10
Why is echothiophate not a first-line drug for open-angle glaucoma?
- It can cause cataracts
- It cannot lower intraocular pressure
- It is inactive when applied topically
- It causes mydriasis rather than miosis
Question 11
Which drugs are used to manage organophosphate toxicity?
- Pralidoxime, atropine, and diazepam
- Neostigmine, pilocarpine, and tacrine
- Physostigmine, ambenonium, and pyridostigmine
- Echothiophate, parathion, and sarin
Question 12
Atropine is used in organophosphate toxicity to reactivate acetylcholinesterase.
- True
- False
Question 13
An organophosphate commonly used as an agricultural insecticide is ____.
Fill in the blank
Question 14
In organophosphate toxicity, which drug is used to reduce persistent convulsions?
- Diazepam
- Atropine
- Pralidoxime
- Vecuronium
Question 15
In carbamate toxicity, atropine is used but pralidoxime is not.
- True
- False
Question 16
Which agent is used to treat carbamate toxicity, while pralidoxime is not?
- Atropine
- Diazepam
- Pralidoxime
- Succinylcholine
Question 17
Atropine can cross the blood-brain barrier because it is a ____ amine.
Fill in the blank
Question 18
What are the greatest inhibitory effects of atropine?
- Bronchial tissue and secretion of sweat and saliva
- Skeletal muscle and cardiac conduction
- Pupil constriction and tear secretion
- Urinary bladder and uterine smooth muscle
Question 19
Atropine's effects in the eye can last for days, while its systemic effects last about 4 hours.
- True
- False
Question 20
What effects does atropine have on the eye?
- Mydriatic and cycloplegic effects
- Miotic and cycloplegic effects
- Mydriatic and lacrimatory effects
- Miotic and spasmodic accommodation effects
Question 21
Which of the following is an antimuscarinic agent?
- Atropine
- Succinylcholine
- Pralidoxime
- Vecuronium
Question 22
Which of the following is a neuromuscular blocker?
- Vecuronium
- Tiotropium
- Benztropine
- Atropine
Question 23
Which of the following is NOT an antimuscarinic agent?
- Succinylcholine
- Scopolamine
- Oxybutynin
- Tropicamide
Question 24
Vecuronium and succinylcholine are both neuromuscular blockers.
- True
- False
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