MCQs and Solution
Q1. Which is NOT a neurotransmitter of ANS
a) Acetylcholine
b) Adrenaline
c) Nor-epinephrine
d) None
Ans: d) none
Q2. Which cranial nerve involve in parasympathetic system
a) I
b) III
c) V
d) VIII
Ans: b) III
- III-oculomotor – eye movement
- VII – Facial – control lacrimation
- IX- Glossopharyngeal – Control salivary secretion
- X- Vegus- – heart, Lungs, Uper GIT and Liver
Q3. Which is not an action of parasympathetic system
a) inhibition of cardiac activity
b) increase digestion
c) Increase lacrimation
d) expand energy
Ans: d) expand energy
Q4. Which is NOT a symptoms of mushroom poisoning/organophosphate poisoning:
a) Salivation, lacrimation, nausea, vomiting
b) Dryness of mouth, hyperpyrexia, hallucination
c) Headache, abdominal colic
d) Bradycardia, hypotension and shock
Ans: b) Dryness of mouth, hyperpyrexia, hallucination
Q5. Which of the following cholinomimetics activates both muscarinic and nicotinic receptors?
a) Carbachol
b) Pilocarpine
c) Nicotine
d) Bethanechol
Ans: a) Carbachol
- Ach: MR & NR
- Methacholine: MR
- Carbachol: MR & NR
- Bethanehol: MR
Q6. Which is NOT a Characteristics of pilocarpine
a) It is a tertiary amine alkaloid
b) It causes miosis and a decrease in intraocular pressure
c) Causes a decrease in secretory and motor activity of gut
d) It is useful in the treatment of glaucoma
Ans: c) Causes a decrease in secretory and motor activity of gut
Q7. Which Cholinergic responsible for GI secretion
a) M1
b) M2
c) M3
d) Nm
Ans: M1
Q8. The mechanism of action of indirect-acting cholinomimetic agents is:
a) Binding to and activation of muscarinic or nicotinic receptors
b) Inhibition of the hydrolysis of endogenous acetylcholine
c) Stimulation of the action of acetylcholinesterase
d) Releasing acetylcholine from storage sites
Ans: b) Inhibition of the hydrolysis of endogenous acetylcholine
- Anticholine esterase/ ChE inhibitors are the indirect acting cholinomimetic agents.
- They decrease the degradation of Ach by inhibiting ChE enzyme
Q9. Which of the following cholinomimetics is commonly used in the treatment of glaucoma?
a) Pilocarpine
b) Lobeline
c) Acetylcholine
d) Neostigmine
ANS: a) Pilocarpine
Q10. Indicate the organophosphate cholinesterase inhibitor, which can be made up in an aqueous solution for ophthalmic use and retains its activity within a week:
a) Physostigmine
b) Edrophonium
c) Echothiophate
d) Neostigmine
Ans: c) Echothiophate
Q11. Which of the following cholinomimetics is most widely used for paralytic ileus and atony of the urinary bladder?
a) Lobeline
b) Neostigmine
c) Pilocarpine
d) Echothiophate
Ans: (b) Neostigmine
Q12. Which of the following cholinomimetics is a drug of choice for reversing the effects of nondepolarizing neuromuscular relaxants?
a) Echothiophate
b) Physostigmine
c) Edrophonium
d) Pilocarpine
Ans: c) Edrophonium or Neostigmine
Q13. Which of the following cholinomimetics is used in the treatment of atropine intoxication?
a) Neostigmine
b) Carbochol
c) Physostigmine
d) Lobeline
Ans: c) Physostigmine
Q14. Which of the following drugs is used for acute toxic effects of organophosphate cholinesterase inhibitors?
a) Atropine
b) Pilocarpine
c) Pralidoxime
d) Edrophonium
Ans: a) Pralidoxime
- Acute toxicity- Pralidoxime, a ChE reactivatior
- Chronic toxicity- Atropine
Q15. Which of the following agents is a ganglion-blocking drug?
a) Homatropine
b) Hexamethonium
c) Rapacuronium
d) Edrophonium
Ans: b) Hexamethonium
Q16. Indicate the skeletal muscle relaxant, which is a depolarizing agent:
a) Vencuronium
b) Scopolamine
c) Succinylcholine
d) Hexamethonium
Ans: c) Succinylcholine
- Depolarizing/ Non comp. blocker: Succinylcholine (Nm Agonist)
- Nondepolarizing/ Competetive blocker: d-Tubocurarin, Atracurium, Vencuronium. These are the Nm Blocker
Q17. Indicate the drug, which is rapidly and fully distributed into CNS and has a greater effect than most other antimuscarinic agents?
a) Atropine
b) Scopolamine
c) Homatropine
d) Ipratropium
Ans: b) Scopolamine
Q18. Which of the following antimuscarinic drugs is often effective in preventing or reversing vestibular disturbances, especially motion sickness?
a) Atropine
b) Ipratropium
c) Scopolamine
d) Homatropine
Ans: c) Scopolamine
Q19. Which of the following drugs is useful in the treatment of Parkinson′s disease?
a) Benztropine
b) Edrophonium
c) Succinylcholine
d) Hexamethonium
Ans: a) Benztropine
Q20. Which of the following agents is used as an inhalation drug in asthma?
a) Atropine
b) Ipratropium
c) Lobeline
d) Homatropine
Ans: b) Ipratropium
Q21. Indicate the ganglion-blocking drug, which can be taken orally for the treatment of hypertension?
a) Mecamylamine
b) Scopolamine
c) Trimethaphane
d) Vecocuronium
Ans: a) Mecamylamine
- It is also used for smoking termination along with nicotine in nicotine patches.
Q22. Which of the following neuromuscular blocking agents cause cardiac arrhythmias?
a) Vecuronium
b) Tubocurarine
c) Rapacuronium
d) Succinylcholine
Ans: d) Succinylcholine
Q23. Which of the following diseases can augment the neuromuscular blockade produced by nondepolarizing muscle relaxants?
a) Myasthenia gravis
b) Burns
c) Asthma
d) Parkinsonism
Ans: a) Myasthenia gravis
Q24. Which is used as mydriatic and cycloplegic action?
a) Homotropine
b) Scopolamine
c) Benztropine
d) Ipratropium
Ans: a) Homatropine
Q25. Signal transduction of Smooth contraction via Ach is
a) activation of cAMP pathway
b) Activation of IP3/DAG pathway
c) Activation of LGIC (Na+ Channel)
d) None
Ans: b) Activation of IP3/DAG pathway