Neostigmine is beneficial in cobra envenomation because: A. It binds to and inactivates cobra toxin B. It reverses coma due to cobra toxin C. It counteracts the cardio-depressant action of cobra toxin D. It antagonizes the paralysing action of cobra toxin

Neostigmine is beneficial in cobra envenomation because:
A. It binds to and inactivates cobra toxin
B. It reverses coma due to cobra toxin
C. It counteracts the cardio-depressant action of
cobra toxin
D. It antagonizes the paralysing action of cobra
toxin
by

1 Answer

Answer :

D. It antagonizes the paralysing action of cobra
toxin
by

Related questions

Neostigmine is beneficial in cobra envenomation because: A. It binds to and inactivates cobra toxin B. It reverses coma due to cobra toxin C. It counteracts the cardio-depressant action of cobra toxin D. It antagonizes the paralysing action of cobra toxin

Description : Neostigmine is beneficial in cobra envenomation because: A. It binds to and inactivates cobra toxin B. It reverses coma due to cobra toxin C. It counteracts the cardio-depressant action of cobra toxin D. It antagonizes the paralysing action of cobra toxin

Last Answer : D. It antagonizes the paralysing action of cobra toxin

The following inhibitor binds only to the ani-onic site of the cholinesterase enzyme: A. Neostigmine B. Physostigmine C. Edrophonium D. Dyflos

Description : The following inhibitor binds only to the ani-onic site of the cholinesterase enzyme: A. Neostigmine B. Physostigmine C. Edrophonium D. Dyflos

Last Answer : C. Edrophonium

Neostigmine is preferred over physostigmine for treating myasthenia gravis because: A. It is better absorbed orally B. It has longer duration of action C. It has additional direct agonistic action on nicotinic receptors at the muscle end plate D. It penetrates blood-brain barrier

Description : Neostigmine is preferred over physostigmine for treating myasthenia gravis because: A. It is better absorbed orally B. It has longer duration of action C. It has additional direct agonistic action on nicotinic receptors at the muscle end plate D. It penetrates blood-brain barrier

Last Answer : C. It has additional direct agonistic action on nicotinic receptors at the muscle end plate

Pyridostigmine differs from neostigmine in that: A. It is more potent orally B. It is longer acting C. It produces less muscarinic side effects D. It does not have any direct action on NM receptors

Description : Pyridostigmine differs from neostigmine in that: A. It is more potent orally B. It is longer acting C. It produces less muscarinic side effects D. It does not have any direct action on NM receptors

Last Answer : B. It is longer acting

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

Description : 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 ... Activation of motor end-plate receptors by neostigmine molecules themselves D. All of the above

Last Answer : D. All of the above

Reactivation of cholinesterase enzyme occurs on hydrolysis of the inhibitor by the same enzyme molecule in case of the following anticholinesterase: A. Edrophonium B. Neostigmine C. Dyflos D. Tacrine

Description : Reactivation of cholinesterase enzyme occurs on hydrolysis of the inhibitor by the same enzyme molecule in case of the following anticholinesterase: A. Edrophonium B. Neostigmine C. Dyflos D. Tacrine

Last Answer : B. Neostigmine

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

Description : 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

Last Answer : A. Exerts depressant effects on the CNS at relatively low doses

Acetylcholine has no therapeutic application because: A. None of its actions are beneficial in any condition B. Its effects are transient C. It produces wide spread actions affecting many organs D. Both ‘B’ and ‘C’ are correct

Description : Acetylcholine has no therapeutic application because: A. None of its actions are beneficial in any condition B. Its effects are transient C. It produces wide spread actions affecting many organs D. Both ‘B’ and ‘C’ are correct

Last Answer : D. Both ‘B’ and ‘C’ are correct

Neostigmine reverses the following actions of d-tubocurarine except: A. Motor weakness B. Ganglionic blockade C. Histamine release D. Respiratory paralysis

Description : Neostigmine reverses the following actions of d-tubocurarine except: A. Motor weakness B. Ganglionic blockade C. Histamine release D. Respiratory paralysis

Last Answer : C. Histamine release

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

Description : 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

Last Answer : A. Shorter duration of action

The anticholinesterase action of edrophonium is short lasting because termination of its action depends on: A. Dissociation and diffusion of the drug from the enzyme B. Hydrolysis of the drug by the enzyme C. Synthesis of fresh enzyme molecules D. A combination of the above three processes

Description : The anticholinesterase action of edrophonium is short lasting because termination of its action depends on: A. Dissociation and diffusion of the drug from the enzyme B. Hydrolysis of the drug by the enzyme C. Synthesis of fresh enzyme molecules D. A combination of the above three processes

Last Answer : A. Dissociation and diffusion of the drug from the enzyme

Unfractionated heparin binds to antithrombin III and inactivates clotting factor(s) (a) Xa (b) Ixa (c) Iia (d) All of the above (e) None of the above

Description : Unfractionated heparin binds to antithrombin III and inactivates clotting factor(s) (a) Xa (b) Ixa (c) Iia (d) All of the above (e) None of the above

Last Answer : Ans: D

Low concentration of bupivacaine is preferred for spinal / epidural obstetric analgesia because: A. It has a longer duration of action B. It can produce sensory blockade without paralysing abdominal muscles C. It distributes more in maternal tissues so that less reaches the foetus D. All of the above are correct

Description : Low concentration of bupivacaine is preferred for spinal / epidural obstetric analgesia because: A. It has a longer duration of action B. It can produce sensory blockade without paralysing abdominal muscles C. ... in maternal tissues so that less reaches the foetus D. All of the above are correct

Last Answer : D. All of the above are correct

The following inhibitor binds only to the ani-onic site of the cholinesterase enzyme: A. Neostigmine B. Physostigmine C. Edrophonium D. Dyflos

Description : The following inhibitor binds only to the ani-onic site of the cholinesterase enzyme: A. Neostigmine B. Physostigmine C. Edrophonium D. Dyflos

Last Answer : C. Edrophonium

Erythromycin should not be given to patient being treated with terfenadine because (a) Erythromycin induces the metabolism of terfenadine (b) Dangerous ventricular arrhythmias can occur (c) Terfenadine inhibits metabolism of erythromycin (d) Terfenadine antagonizes the antimicrobal action of erythromycin

Description : Erythromycin should not be given to patient being treated with terfenadine because (a) Erythromycin induces the metabolism of terfenadine (b) Dangerous ventricular arrhythmias can occur ... inhibits metabolism of erythromycin (d) Terfenadine antagonizes the antimicrobal action of erythromycin

Last Answer : Ans: B

Erythromycin should not be given to a patient being treated with terfenadine because: A. Erythromycin induces the metabolism of terfenadine B. Dangerous ventricular arrhythmias can occur C. Terfenadine inhibitis metabolism of erythromycin D. Terfenadine antagonizes the antimicrobial action of erythromycin

Description : Erythromycin should not be given to a patient being treated with terfenadine because: A. Erythromycin induces the metabolism of terfenadine B. Dangerous ventricular arrhythmias ... Terfenadine inhibitis metabolism of erythromycin D. Terfenadine antagonizes the antimicrobial action of erythromycin

Last Answer : B. Dangerous ventricular arrhythmias can occur

Esmolol has the following features except: A. Rapidly developing, shortlasting β adrenergic blockade B. Cardioselectivity of action C. Intrinsic sympathomimetic activity D. Suitability for intraoperative use

Description : Esmolol has the following features except: A. Rapidly developing, shortlasting β adrenergic blockade B. Cardioselectivity of action C. Intrinsic sympathomimetic activity D. Suitability for intraoperative use

Last Answer : C. Intrinsic sympathomimetic activity

The following is true of fenfluramine except: A. It lacks CNS stimulant action B. Its use has been associated with cardiac abnormalities and pulmonary hypertension C. It causes weight loss independent of reduced food intake D. It enhances serotonergic transmission in the brain

Description : The following is true of fenfluramine except: A. It lacks CNS stimulant action B. Its use has been associated with cardiac abnormalities and pulmonary hypertension C. It causes weight loss independent of reduced food intake D. It enhances serotonergic transmission in the brain

Last Answer : C. It causes weight loss independent of reduced food intake

Ephedrine is similar to adrenaline in the following feature: A. Potency B. Inability to penetrate blood-brain barrier C. Duration of action D. Producing both α and β adrenergic effects

Description : Ephedrine is similar to adrenaline in the following feature: A. Potency B. Inability to penetrate blood-brain barrier C. Duration of action D. Producing both α and β adrenergic effects

Last Answer : D. Producing both α and β adrenergic effects

The following action of adrenaline is mediated by both α and β receptors producing the same directional effect: A. Cardiac stimulation B. Intestinal relaxation C. Dilatation of pupil D. Bronchodilatation

Description : The following action of adrenaline is mediated by both α and β receptors producing the same directional effect: A. Cardiac stimulation B. Intestinal relaxation C. Dilatation of pupil D. Bronchodilatation

Last Answer : B. Intestinal relaxation

The following sympathomimetic amine has agonistic action on α1 + α2 + β1 + β3 adrenoceptors, but not on β2 receptors: A. Adrenaline B. Noradrenaline C. Isoprenaline D. Phenylephrine

Description : The following sympathomimetic amine has agonistic action on α1 + α2 + β1 + β3 adrenoceptors, but not on β2 receptors: A. Adrenaline B. Noradrenaline C. Isoprenaline D. Phenylephrine

Last Answer : B. Noradrenaline

The principal process which terminates the action of noradrenaline released from adrenergic nerve ending is: A. Degradation by MAO B. Methylation by COMT C. Axonal uptake D. Extraneuronal uptake

Description : The principal process which terminates the action of noradrenaline released from adrenergic nerve ending is: A. Degradation by MAO B. Methylation by COMT C. Axonal uptake D. Extraneuronal uptake

Last Answer : C. Axonal uptake

Which of the following mydriatics has the fastest and briefest action: A. Atropine B. Homatropine C. Tropicamide D. Cyclopentolate

Description : Which of the following mydriatics has the fastest and briefest action: A. Atropine B. Homatropine C. Tropicamide D. Cyclopentolate

Last Answer : C. Tropicamide

Agonistic action on which of the following adrenergic receptors located on ciliary epithelial cells reduces aqueous secretion: A. β1 receptor B. β2 receptor C. α1 receptor D. α2 receptor

Description : Agonistic action on which of the following adrenergic receptors located on ciliary epithelial cells reduces aqueous secretion: A. β1 receptor B. β2 receptor C. α1 receptor D. α2 receptor

Last Answer : D. α2 receptor

Beta adrenergic blockers lower intraocular tension by: A. Down regulating adenylyl cyclase in ciliary body through reduced activation of β2 adrenoceptors B. Constricting ciliary blood vessels C. Blocking adrenergic action on trabecular meshwork D. Reducing aqueous formation unrelated to beta adrenoceptor mediation

Description : Beta adrenergic blockers lower intraocular tension by: A. Down regulating adenylyl cyclase in ciliary body through reduced activation of β2 adrenoceptors B. Constricting ciliary blood vessels ... action on trabecular meshwork D. Reducing aqueous formation unrelated to beta adrenoceptor mediation

Last Answer : A. Down regulating adenylyl cyclase in ciliary body through reduced activation of β2 adrenoceptors

The cotransmitter may serve the following function/ functions: A. Regulate the release of the primary transmitter from the nerve ending B. Alter postjunctional action of the primary transmitter C. Itself act as an alternative transmitter D. All of the above

Description : The cotransmitter may serve the following function/ functions: A. Regulate the release of the primary transmitter from the nerve ending B. Alter postjunctional action of the primary transmitter C. Itself act as an alternative transmitter D. All of the above

Last Answer : D. All of the above

Tetrodotoxin blocks nerve impulse/junctional transmission by: A. Anticholinergic action B. Depleting acetylcholine C. Blocking Na+ channels D. Blocking Ca2+ channels

Description : Tetrodotoxin blocks nerve impulse/junctional transmission by: A. Anticholinergic action B. Depleting acetylcholine C. Blocking Na+ channels D. Blocking Ca2+ channels

Last Answer : C. Blocking Na+ channels

Esmolol has the following features except: A. Rapidly developing, shortlasting β adrenergic blockade B. Cardioselectivity of action C. Intrinsic sympathomimetic activity D. Suitability for intraoperative use

Description : Esmolol has the following features except: A. Rapidly developing, shortlasting β adrenergic blockade B. Cardioselectivity of action C. Intrinsic sympathomimetic activity D. Suitability for intraoperative use

Last Answer : C. Intrinsic sympathomimetic activity

Ephedrine is similar to adrenaline in the following feature: A. Potency B. Inability to penetrate blood-brain barrier C. Duration of action D. Producing both α and β adrenergic effects

Description : Ephedrine is similar to adrenaline in the following feature: A. Potency B. Inability to penetrate blood-brain barrier C. Duration of action D. Producing both α and β adrenergic effects

Last Answer : D. Producing both α and β adrenergic effects

The following action of adrenaline is not mediated by β receptors: A. Dilatation of blood vessels B. Dilatation of pupil C. Bronchodilation D. Renin release from kidney

Description : The following action of adrenaline is not mediated by β receptors: A. Dilatation of blood vessels B. Dilatation of pupil C. Bronchodilation D. Renin release from kidney

Last Answer : B. Dilatation of pupil

The following action of adrenaline is mediated by both α and β receptors producing the same directional effect: A. Cardiac stimulation B. Intestinal relaxation C. Dilatation of pupil D. Bronchodilatation

Description : The following action of adrenaline is mediated by both α and β receptors producing the same directional effect: A. Cardiac stimulation B. Intestinal relaxation C. Dilatation of pupil D. Bronchodilatation

Last Answer : B. Intestinal relaxation

The following sympathomimetic amine has agonistic action on α 1 + α 2 + β 1 + β 3 adrenoceptors, but not on β 2 receptors: A. Adrenaline B. Noradrenaline C. Isoprenaline D. Phenylephrine

Description : The following sympathomimetic amine has agonistic action on α 1 + α 2 + β 1 + β 3 adrenoceptors, but not on β 2 receptors: A. Adrenaline B. Noradrenaline C. Isoprenaline D. Phenylephrine

Last Answer : B. Noradrenaline

The cotransmitter may serve the following function/ functions: A. Regulate the release of the primary transmitter from the nerve ending B. Alter postjunctional action of the primary transmitter C. Itself act as an alternative transmitter D. All of the above

Description : The cotransmitter may serve the following function/ functions: A. Regulate the release of the primary transmitter from the nerve ending B. Alter postjunctional action of the primary transmitter C. Itself act as an alternative transmitter D. All of the above

Last Answer : D. All of the above

Tetrodotoxin blocks nerve impulse/junctional transmission by: A. Anticholinergic action B. Depleting acetylcholine C. Blocking Na+ channels D. Blocking Ca2+ channels

Description : Tetrodotoxin blocks nerve impulse/junctional transmission by: A. Anticholinergic action B. Depleting acetylcholine C. Blocking Na+ channels D. Blocking Ca2+ channels

Last Answer : C. Blocking Na+ channels

Bacillus thuringiensis forms protein crystals which contain insecticidal protein. This protein (a) binds with epithelial cells of midgut of the insect pest ultimately killing it (b) is coded by several genes including the gene cry (c) is activated by acid pH of the foregut of the insect pest (d) does not kill the carrier bacterium which is itself resistant to this toxin.

Description : Bacillus thuringiensis forms protein crystals which contain insecticidal protein. This protein (a) binds with epithelial cells of midgut of the insect pest ultimately killing it (b) is coded by several ... pest (d) does not kill the carrier bacterium which is itself resistant to this toxin.

Last Answer : (a) binds with epithelial cells of midgut of the insect pest ultimately killing it

Oral neomycin is beneficial in hepatic coma because: A. In hepatic failure patients it is absorbed from the intestines B. It decreases ammonia production by gut bacteria C. It reacts chemically with ammonia in the gut to prevent its diffusion into blood D. It induces ammonia detoxifying enzymes in the liver

Description : Oral neomycin is beneficial in hepatic coma because: A. In hepatic failure patients it is absorbed from the intestines B. It decreases ammonia production by gut bacteria C. It reacts chemically with ... gut to prevent its diffusion into blood D. It induces ammonia detoxifying enzymes in the liver

Last Answer : B. It decreases ammonia production by gut bacteria

Vasoconstrictors should not be used in: A. Neurogenic shock B. Haemorrhagic shock C. Secondary shock D. Hypotension due to spinal anaesthesia

Description : Vasoconstrictors should not be used in: A. Neurogenic shock B. Haemorrhagic shock C. Secondary shock D. Hypotension due to spinal anaesthesia

Last Answer : C. Secondary shock

The quarternary analogues of belladonna alkaloids are preferred over the natural alkaloids for antisecretory/ antispasmodic indications because: A. They have additional nicotinic receptor blocking activity B. They are incompletely absorbed after oral administration C. They are devoid of CNS and ocular effects D. Dose to dose they are more potent than atropine

Description : The quarternary analogues of belladonna alkaloids are preferred over the natural alkaloids for antisecretory/ antispasmodic indications because: A. They have additional nicotinic receptor blocking activity B. They are ... of CNS and ocular effects D. Dose to dose they are more potent than atropine

Last Answer : C. They are devoid of CNS and ocular effects

N-acetyl cysteine is beneficial in acute paracetamol poisoning because: A. It reacts with paracetamol to form a nontoxic complex B. It inhibits generation of the toxic metabolite of paracetamol C. It is a free radical scavenger D. It replenishes hepatic glutathione which in turn binds the toxic metabolite of paracetamol

Description : N-acetyl cysteine is beneficial in acute paracetamol poisoning because: A. It reacts with paracetamol to form a nontoxic complex B. It inhibits generation of the toxic metabolite of ... scavenger D. It replenishes hepatic glutathione which in turn binds the toxic metabolite of paracetamol

Last Answer : D. It replenishes hepatic glutathione which in turn binds the toxic metabolite of paracetamol

Retroviruses are so-named because their reverse transcriptase _____. a. reverses the flow of genetic information by stimulating information to proceed from RNA to DNA. b. reverses the normal multiplication of cells from a low rate to a high rate. c. reverses the ability of viruses to associate with cells. d. reverses the action of drugs on viruses and allows them to continue multiplying in living cells.

Description : Retroviruses are so-named because their reverse transcriptase _____. a. reverses the flow of genetic information by stimulating information to proceed from RNA to DNA. b. reverses the normal ... the action of drugs on viruses and allows them to continue multiplying in living cells.

Last Answer : a. reverses the flow of genetic information by stimulating information to proceed from RNA to DNA.

Neostigmine is preferred over physostigmine for treating myasthenia gravis because: A. It is better absorbed orally B. It has longer duration of action C. It has additional direct agonistic action on nicotinic receptors at the muscle end plate D. It penetrates blood-brain barrier

Description : Neostigmine is preferred over physostigmine for treating myasthenia gravis because: A. It is better absorbed orally B. It has longer duration of action C. It has additional direct agonistic action on nicotinic receptors at the muscle end plate D. It penetrates blood-brain barrier

Last Answer : C. It has additional direct agonistic action on nicotinic receptors at the muscle end plate

Clavulanic acid is combined with amoxicillin because (a) It kills bacteria that are not killed by-moxicillin (b) It reduces renal clearance of amoxicillin (c) It counteracts the adverse effects of amoxicillin (d) It inhibits beta lactamases that destroy amoxicillin

Description : Clavulanic acid is combined with amoxicillin because (a) It kills bacteria that are not killed by-moxicillin (b) It reduces renal clearance of amoxicillin (c) It counteracts the adverse effects of amoxicillin (d) It inhibits beta lactamases that destroy amoxicillin

Last Answer : Ans: D

Clavulanic acid is combined with amoxicillin because: A. It kills bacteria that are not killed by amoxicillin B. It retards renal excretion of amoxicillin C. It counteracts the adverse effects of amoxicillin D. It inhibits beta lactamases that destroy amoxicillin

Description : Clavulanic acid is combined with amoxicillin because: A. It kills bacteria that are not killed by amoxicillin B. It retards renal excretion of amoxicillin C. It counteracts the adverse effects of amoxicillin D. It inhibits beta lactamases that destroy amoxicillin

Last Answer : D. It inhibits beta lactamases that destroy amoxicillin

In hyperthyroidism, β adrenergic blockers are used: A. To induce euthyroid state B. As definitive therapy C. For rapid control of certain symptoms while awaiting response to carbimazole D. To reduce basal metabolic rate

Description : Select the β-adrenergic blocker that has additional α1 blocking, vasodilator and antioxidant properties: A. Carvedilol B. Celiprolol C. Acebutolol D. Metoprolol

Last Answer : C. Acebutolol

Select the β-adrenergic blocker that has additional α1 blocking, vasodilator and antioxidant properties: A. Carvedilol B. Celiprolol C. Acebutolol D. Metoprolol

Description : Select the β-adrenergic blocker that has additional α1 blocking, vasodilator and antioxidant properties: A. Carvedilol B. Celiprolol C. Acebutolol D. Metoprolol

Last Answer : A. Carvedilol

In a patient of myocardial infarction, β adrenergic blockers are used with the following aim/aims: A. To reduce the incidence of reinfarction B. To prevent cardiac arrhythmias C. To limit size of the infarct D. All of the above

Description : In a patient of myocardial infarction, β adrenergic blockers are used with the following aim/aims: A. To reduce the incidence of reinfarction B. To prevent cardiac arrhythmias C. To limit size of the infarct D. All of the above

Last Answer : D. All of the above

Select the β adrenergic blocker that is primarily eliminated unchanged by renal excretion: A. Propranolol B. Metoprolol C. Esmolol D. Atenolol

Description : Select the β adrenergic blocker that is primarily eliminated unchanged by renal excretion: A. Propranolol B. Metoprolol C. Esmolol D. Atenolol

Last Answer : D. Atenolol

The following is not a feature of cardioselective beta blockers, when compared to propranolol: A. They are ineffective in suppressing muscle tremor B. They are safer in diabetics C. They are less likely to cause bradycardia D. They are less likely to worsen Raynaud’s disease

Description : The following is not a feature of cardioselective beta blockers, when compared to propranolol: A. They are ineffective in suppressing muscle tremor B. They are safer in diabetics C. They are less likely to cause bradycardia D. They are less likely to worsen Raynaud’s disease

Last Answer : C. They are less likely to cause bradycardia

Select the ultrashort acting cardioselective β adrenergic blocker: A. Bisoprolol B. Timolol C. Sotalol D. Esmolol

Description : Select the ultrashort acting cardioselective β adrenergic blocker: A. Bisoprolol B. Timolol C. Sotalol D. Esmolol

Last Answer : D. Esmolol

β-adrenergic blockers are indicated in the following conditions except: A. Hypertrophic cardiomyopathy B. Congestive heart failure C. Vasospastic angina pectoris D. Dissecting aortic aneurysm

Description : β-adrenergic blockers are indicated in the following conditions except: A. Hypertrophic cardiomyopathy B. Congestive heart failure C. Vasospastic angina pectoris D. Dissecting aortic aneurysm

Last Answer : C. Vasospastic angina pectoris