Freshers Drugs Acting On Autonomous Nervous System Objective Type Questions And Answers

71. a1 – receptors are coupled with _______ G protein.
(a) Gs
(b) Gi
(c) Gq
(d) Go
Ans: C

72. Hyoscine differs from atropine in that it
(a) Exerts depressant effects on the CNS at relatively low doses
(b) Exerts more potent effects on the heart than on the eye
(c) Is longer acting
(d) Has weaker antimotion sickness activity
Ans: A

73. Which of the following anticholinergic drugs is primarily used in preanaesthetic medication and during surgery
(a) Glycopyrrolate
(b) Pipenzolate methyl bromide
(c) Isopropamide
(d) Dicyclomine
Ans: A

74. Glycopyrrolate is the preferred antimuscannic drug for use before and during surgery because
(a) It is potent and fast acting
(b) It has no central action
(c) It has antisecretory and vagolytic actions
(d) All of the above
Ans: D

75. Which of the following mydriatics has the fastest and briefest action ?
(a) Atropine
(b) Homatropine
(c) Tropicamide
(d) Cyclopentolate
Ans: C

76. The most suitable mydratic for a patient of corneal ulcer is
(a) Atropine sulfate
(b) Homatropine
(c) Cyclopentolate
(d) Tropicamide
Ans: A

77. The most effective antidote for belladonna poisoning is
(a) Neostigmine
(b) Physostigmine
(c) Pilocarpine
(d) Methacholine
Ans: B

78. Atropine is contraindicated in
(a) Cyclic AMP
(b) Inositol trisphosphate
(c) Diacyl glycerols
(d) G protein
Ans: D

79. Select the correct statement from the following about a1 – adrenergic receptor agonists
(a) Isoproterenol > epinephrine = norepinephrine
(b) Epinephrine > isoproterenol > norepinephrine
(c) Isoproterenol = epinephrine = norepinephrine
(d) Epinephrine = norepinephrine > isoproterenol
Ans: A

80. The most efficacious inhibitor of catecholamine synthesis in the body is
(a) a - methyl – p - tyrosine
(b) a - methyldopa
(c) a - methyl - norepinephrine
(d) Pyrogallol
Ans: A

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