Pharmacology - Mock Test 40

Question 391

The rate limiting enzyme in the synthesis of catecholamines is

A) Tyrosine hydroxylase B) Dopa decarboxylase C) Dopamine β-hydroxylase D) Noradrenaline N-methyl transferase

---

No Details

Question 392

Select the drug which affords faster and greater symptomatic relief in benign hypertrophy of prostate

A) Terazosin B) Desmopressin C) Finasteride D) Sildenafil

---

No Details

Question 393

Which of the following is a noncatecholamine sympathomimetic

A) Adrenaline B) Ephedrine C) Dopamine D) Isoprenaline

---

No Details

Question 394

Phentolamine test is considered positive for pheochromocytoma if there is a

A) Rise in BP by more than 35 mm Hg systolic and 25 mm Hg diastolic B) Rise in systolic but fall in diastolic BP C) Fall in both systolic and diastolic BP by less than 20 mm Hg D) Fall in BP by more than 35 mm Hg systolic and more than 25 mm Hg diastolic

---

No Details

Question 395

Pralidoxime can reactivate cholinesterase enzyme that has been inactivated by

A) Carbamate anticholinesterases B) Organophosphate anticholinesterases C) Both carbamate and organophosphate anticholinesterases D) Reversible anticholinesterases

---

No Details

Question 396

Atropine does not antagonise the following feature of anticholinesterase poisoning

A) Hypotension B) Central excitation C) Muscle paralysis D) Bronchoconstriction

---

No Details

Question 397

Prazosin is an effective antihypertensive while nonselective α adrenergic blockers are not because

A) It is the only orally active α blocker B) It improves plasma lipid profile C) It does not concurrently enhance noradrenaline release D) It improves urine flow in males with prostatic hypertrophy

---

No Details

Question 398

Which is the most important drug in the treatment of organophosphate poisoning

A) Atropine sulfate B) Pralidoxime C) Diazepam D) Adrenaline

---

No Details

Question 399

A suspected case of poisoning has been brought to the casualty with weakness, fainting, involuntary passage of urine and stools, profuse sweating, salivation, watering from nose and eyes. His pulse is 120/min, low volume, BP 90/60 mm Hg, respiration shallow, pupil constricted, muscles flabby with occasional fasciculations. Which is the most likely type of poisoning

A) Belladonna B) Barbiturate C) Anticholinesterase D) Dicophane (DDT)

---

No Details

Question 400

The drug which produces vasoconstriction despite being an α adrenergic blocker is

A) Phenoxybenzamine B) Ergotamine C) Dihydroergotoxine D) Tolazoline

---

No Details