ADRENOCEPTOR ANTAGONIST DRUGS Multiple choice Questions

Posted On:February 17, 2019, Posted By: Latest Interview Questions, Views: 169, Rating :

Best ADRENOCEPTOR ANTAGONIST DRUGS Questions and Answers

Dear Readers, Welcome to ADRENOCEPTOR ANTAGONIST DRUGS Objective Questions and Answers have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of ADRENOCEPTOR ANTAGONIST DRUGS Multiple choice Questions. These Objective type ADRENOCEPTOR ANTAGONIST DRUGS Questions are very important for campus placement test and job interviews. As per my experience good interviewers hardly plan to ask any particular question during your Job interview and these model questions are asked in the online technical test and interview of many Medical Industry.

1. Which of the following drugs is a nonselective alfa receptor antagonist?

a) Prazosin

b) Phentolamine

c) Metoprolol

d) Reserpine

ADRENOCEPTOR ANTAGONIST DRUGS MCQs

2. Indicate the alfa1-selective antagonist:

a) Phentolamine

b) Dihydroergotamine

c) Prazosin

d) Labetalol

 

3. Which of the following agents is an alfa2–selective antagonist?

a) Yohimbine

b) Tamsulosin

c) Tolazoline

d) Prazosin

 

4. Indicate the irreversible alfa receptor antagonist:

a) Tolazoline

b) Labetalol

c) Prazosin

d) Phenoxybenzamine

 

5. Which of the following drugs is an nonselective beta receptor antagonist?

a) Metoprolol

b) Atenolol

c) Propranolol

d) Acebutolol

 

6. Indicate the beta1-selective antagonist:

a) Propranolol

b) Metoprolol

c) Carvedilol

d) Sotalol

 

7. Which of the following agents is a beta2–selective antagonist?

a) Tolazolin

b) Pindolol

c) Ergotamin

d) Butoxamine

 

8. Indicate the beta adrenoreceptor antagonist, which has partial beta–agonist activity:

a) Propranolol

b) Metoprolol

c) Pindolol

d) Betaxolol

 

9. Which of the following drugs is a reversible nonselective alfa, beta antagonist?

a) Labetalol

b) Phentolamine

c) Metoprolol

d) Propranolol

 

10. Indicate the indirect-acting adrenoreceptor blocking drug:

a) Tolazoline

b) Reserpine

c) Carvedilol

d) Prazosin

 

11. The principal mechanism of action of adrenoreceptor antagonists is:

a) Reversible or irreversible interaction with adrenoreceptors

b) Depletion of the storage of catecholamines

c) Blockade of the amine reuptake pumps

d) Nonselective MAO inhibition

 

12. Characteristics of alfa-receptor antagonists include all of the following EXCEPT:

a) They cause a fall in peripheral resistance and blood pressure

b) They cause epinephrine reversal (convert a pressor response to a depressor response)

c) Bronchospasm

d) They may cause postural hypotension and reflex tachycardia

 

13. Which of the following drugs is an imidazoline derivative and a potent competitive antagonist at both alfa1 and alfa2 receptors?

a) Prazosin

b) Labetalol

c) Phenoxybenzamine

d) Phentolamine

 

14. Characteristics of phentolamine include all of the following EXCEPT:

a) Reduction in peripheral resistance

b) Stimulation of responses to serotonin

c) Tachycardia

d) Stimulation of muscarinic, H1 and H2 histamine receptors

 

15. The principal mechanism of phentolamine-induced tachycardia is:

a) Antagonism of presynaptic alfa2 receptors enhances norepinephrine release, which causes cardiac

stimulation via unblocked beta receptors

b) Baroreflex mechanism

c) Direct effect on the heart by stimulation of beta1 receptors

d) Inhibition of transmitter reuptake at noradrenergic synapses

 

16. Nonselective alfa-receptor antagonists are most useful in the treatment of:

a) Asthma

b) Cardiac arrhythmias

c) Pheochromocytoma

d) Chronic hypertension

 

17. The main reason for using alfa-receptor antagonists in the management of pheochromocytoma is:

a) Inhibition of the release of epinephrine from the adrenal medulla

b) Blockade of alfa2 receptors on vascular smooth muscle results in epinephrine stimulation of unblocked alfa2 receptors

c) Direct interaction with and inhibition of beta2 adrenoreceptors

d) Antagonism to the release of renin

 

18. Which of the following drugs is useful in the treatment of pheochromocytoma?

a) Phenylephrine

b) Propranolol

c) Phentolamine

d) Epinephrine

 

19. Indicate adrenoreceptor antagonist agents, which are used for the management of pheochromocytoma:

a) Selective beta2-receptor antagonists

b) Nonselective beta-receptor antagonists

c) Indirect-acting adrenoreceptor antagonist drugs

d) ?lfa-receptor antagonists

 

20. The principal adverse effects of phentolamine include all of the following EXCEPT:

a) Diarrhea

b) Bradycardia

c) Arrhythmias

d) Myocardial ischemia

 

21. Indicate the reversible nonselective alfa-receptor antagonist, which is an ergot derivative:

a) Ergotamine

b) Prazosin

c) Phenoxybenzamine

d) Carvedilol

 

22. Indicate an alfa-receptor antagonist, which binds covalently to alfa receptors, causing irreversible blockade of long duration (14-48 hours or longer):

a) Phentolamine

b) Phenoxybenzamine

c) Ergotamine

d) Prazosin

 

23. Compared with phentolamine, prazosin has all of the following features EXCEPT:

a) Irreversible blockade of alfa receptors

b) Highly selective for alfa1 receptors

c) The relative absence of tachycardia

d) Persistent block of alfa1 receptors

 

24. Which of the following statements is not correct?

a) There are at least three subtypes of alfa1 receptors, designated alfa1a, alfa1b and alfa1d

b) ALFA1a subtype mediates prostate smooth muscle contraction

c) ALFA1b subtype mediates vascular smooth muscle contraction

d) ALFA1a subtype mediates both vascular and prostate smooth muscle contraction

 

25. Indicate an alfa1 adrenoreceptor antagonist, which has great selectivity for alfa1a subtype:

a) Prazosin

b) Tamsulosin

c) Phenoxybenzamine

d) Phentolamine

 

 

26. Subtype-selective alfa1 receptor antagonists such as tamsulosin, terazosin, alfusosin are efficacious in:

a) Hyperthyroidism

b) Cardiac arrhythmias

c) Benign prostatic hyperplasia (BPH)

d) Asthma

 

27. Indicate an alfa receptor antagonist, which is an efficacious drug in the treatment of mild to moderate systemic hypertension:

a) Phentolamine

b) Tolazoline

c) Ergotamine

d) Prazosin

 

28. Which of the following alfa receptor antagonists is useful in reversing the intense local vasoconstriction caused by inadvertent infiltration of norepinephrine into subcutaneous tissue during intravenous administration?

a) Propranolol

b) Phentolamine

c) Tamsulosin

d) Ergotamine

 

29. Beta-blocking drugs-induced chronically lower blood pressure may be associated with theirs effects on:

a) The heart

b) The blood vessels

c) The renin-angiotensin system

d) All of the above

 

30. Characteristics of beta-blocking agents include all of the following EXCEPT:

a) They occupy beta receptors and competitively reduce receptor occupancy by catecholamines or other beta agonists

b) They do not cause hypotension in individuals with normal blood pressure

c) They induce depression and depleted stores of catecholamines

d) They can cause blockade in the atrioventricular node

 

31. Beta-receptor antagonists have all of the following cardiovascular effects EXCEPT:

a) The negative inotropic and chronotropic effects

b) Acute effects of these drugs include a fall in peripheral resistance

c) Vasoconstriction

d) Reduction of the release of renin

 

32. Beta-blocking agents have all of the following effects except:

a) Increase plasma concentrations of HDL and decrease of VLDL

b) Bronchoconstriction

c) Decrease of aqueous humor prodaction

d) “membrane-stabilizing” action

 

33. Beta-receptor antagonists cause:

a) Stimulation of lipolysis

b) Stimulation of gluconeogenesis

c) Inhibition of glycogenolysis

d) Stimulation of insulin secretion

 

34. Propranolol has all of the following cardiovascular effects EXCEPT:

a) It decreases cardiac work and oxygen demand

b) It reduces blood flow to the brain

c) It inhibits the renin secretion

d) It increases the atrioventricular nodal refractory period

 

35. Propranolol-induced adverse effects include all of the following EXCEPT:

a) Bronchoconstriction

b) “supersensitivity” of beta-adrenergic receptors (rapid withdrawal)

c) Hyperglycemia

d) Sedation, sleep disturbances, depression and sexual dysfunction

 

36. Propranolol is used in the treatment all of the following diseases EXCEPT:

a) Cardiovascular diseases

b) Hyperthyroidism

c) Migraine headache

d) Bronchial asthma

 

37. Metoprolol and atenolol:

a) Are members of the beta1-selective group

b) Are nonselective beta antagonists

c) Have intrinsic sympathomimetic activity

d) Have an anesthetic action

 

38. Which of the following beta receptor antagonists is preferable in patients with asthma, diabetes or peripheral vascular diseases?

a) Propranolol

b) Metoprolol

c) Nadolol

d) Timolol

 

39. Indicate a beta receptor antagonist, which has very long duration of action:

a) Metoprolol

b) Propranolol

c) Nadolol

d) Pindolol

 

40. Indicate a beta1-selective receptor antagonist, which has very long duration of action:

a) Betaxolol

b) Sotalol

c) Nadolol

d) Metoprolol

 

41. Which of the following drugs is a nonselective beta-blocker without intrinsic sympathomimetic or local anesthetic activity and used for the treatment of life-threatening ventricular arrhythmias?

a) Propranolol

b) Oxprenolol

c) Sotalol

d) Atenolol

 

42. Indicate a beta receptor antagonist with intrinsic sympathomimetic activity:

a) Propranolol

b) Oxprenolol

c) Metoprolol

d) Carvedilol

 

43. Pindolol, oxprenolol have all of the following properties EXCEPT:

a) They are nonselective beta antagonists

b) They have no partial agonist activity

c) They are less likely to cause bradycardia and abnormalities in plasma lipids

d) They are effective in hypertension and angina

 

44. Which of the following drugs has both alfa1-selective and beta-blocking effects?

a) Labetalol

b) Betaxolol

c) Propranolol

d) Timolol

 

45. Characteristics of carvedilol include all of the following EXCEPT:

a) It is a beta1-selective antagonist

b) It has both alfa1-selective and beta-blocking effects

c) It attenuates oxygen free radical-initiated lipid peroxidation

d) It inhibits vascular smooth muscle mitogenesis

 

46. Indicate the adrenoreceptor antagonist drug, which is a rauwolfia alkaloid:

a) Prazosin

b) Propranolol

c) Reserpine

d) Phentolamine

 

47. Characteristics of reserpine include all of the following EXCEPT:

a) It inhibits the uptake of norepinephrine into vesicles and MAO

b) It decreases cardiac output, peripheral resistance and inhibits pressor reflexes

c) It may cause a transient sympathomimetic effect

d) It depletes stores of catecholamines and serotonin in the brain

 

48. Indicate a beta-blocker, which is particularly efficacious in thyroid storm:

a) Pindolol

b) Sotalol

c) Phentolamine

d) Propranolol

 

49. Beta-receptor blocking drugs are used in the treatment all of the following diseases EXCEPT:

a) Hypertension, ischemic heart disease, cardiac arrhythmias

b) Glaucoma

c) Pheochromocytoma

d) Hyperthyroidism

 

50. Beta-blocker-induced adverse effects include all of the following EXCEPT:

a) Bronchoconstriction

b) Depression of myocardial contractility and excitability

c) “supersensitivity” of beta-receptors associated with rapid withdrawal of drugs

d) Hyperglycemia


ADRENORECEPTOR ACTIVATING DRUGS Questions & Answers
ADRENOCEPTOR ANTAGONIST DRUGS Multiple choice Questions
Anti Adrenergic drug Questions & Answers