Pharmacology - Mock Test 46

Question 451

Tetrodotoxin blocks nerve impulse/junctional transmission by

A) Anticholinergic action B) Depleting acetylcholine C) Blocking Na⁺ channels D) Blocking Ca²⁺ channels

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Question 452

The sympathetic and parasympathetic systems exert functionally opposite influences on the following parameters <u>except</u>

A) Heart rate B) Atrial refractory period C) Pupil diameter D) Intestinal motility

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Question 453

Which of the following organs is innervated only by parasympathetic nerves

A) Iris muscles B) Ciliary muscle C) Sweat glands D) Splenic capsule

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Question 454

Select the drug which has been found to be a strong human teratogen

A) Isoniazid B) Isotretinoin C) Hydralazine D) Propylthiouracil

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Question 455

The following is a proven human teratogen

A) Chloroquine B) Warfarin sodium C) Dicyclomine D) Methyldopa

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Question 456

The most vulnerable period of pregnancy for the causation of foetal malformations due to drugs is

A) 18-55 days of gestation B) 56-84 days of gestation C) Second trimester D) 36 weeks onwards

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Question 457

Adverse consequences may follow sudden discontinuation of the following drug after chronic intake

A) Cocaine B) Cannabis C) Clonidine D) All of the above

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Question 458

‘Addiction’ and ‘habituation’

A) Are fundamentally different phenomena B) Are produced by different set of drugs/substances C) Differ from one another by the presence or absence of physical dependence D) Differ from each other in the degree of attendant psychological dependence

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Question 459

Which of the following constitutes ‘drug abuse’

A) Physician prescribed use of penicillin G for the cure of viral fever B) Self administration of aspirin to relieve headache C) Repeated self administration of morphine to derive euphoria D) All of the above

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Question 460

Adaptive neurophysiological changes produced by repeated administration of a drug, which result in the appearance of characteristic withdrawal syndrome on discontinuation of the drug is called

A) Drug addiction B) Drug abuse C) Psychological dependence D) Physical dependence

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