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Beta2 receptor stimulation includes all of the following effects EXCEPT:
Stimulation of renin secretion Fall of potassium concentration in plasma Relaxation of bladder, uterus Tachycardia
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Hyperglycemia induced by epinephrine is due to:
Gluconeogenesis (beta2) Inhibition of insulin secretion (alfa) Stimulation of glycogenolysis (beta2) All of the above
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Which of the following effects is associated with beta3-receptor stimulation?
Lipolysis Decrease in platelet aggregation Bronchodilation Tachycardia
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Which of the following statements is not correct?
Epinephrine acts on both alfa- and beta-receptors Norepinephrine has a predominantly beta action Methoxamine has a predominantly alfa action Isoprenaline has a predominantly beta action
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Indicate the drug, which is a direct-acting both alfa- and beta-receptor agonist:
Norepinephrine Methoxamine Isoproterenol Ephedrine
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Which of the following agents is an alfa1 alfa2 beta1 beta2 receptor agonist?
Methoxamine Albuterol Epinephrine Norepinephrine
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Indicate the direct-acting sympathomimetic, which is an alfa1 alfa2 beta1 receptor agonist:
Isoproterenol Ephedrine Dobutamine Norepinephrine
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Which of the following agents is an alfa1-selective agonist?
Norepinephrine Methoxamine Ritodrine Ephedrine
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Indicate the alfa2-selective agonist:
Xylometazoline Epinephrine Dobutamine Methoxamine
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Which of the following agents is a nonselective beta receptor agonist?
Norepinephrine Terbutaline Isoproterenol Dobutamine
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Indicate the beta1-selective agonist:
Isoproterenol Dobutamine Metaproterenol Epinephrine
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Which of the following sympathomimetics is a beta2-selective agonist?
Terbutaline Xylometazoline Isoproterenol Dobutamine
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Indicate the indirect-acting sympathomimetic agent:
Epinephrine Phenylephrine Ephedrine Isoproterenol
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Epinephrine produces all of the following effects EXCEPT:
Positive inotropic and chronotropic actions on the heart (beta1 receptor) Increase peripheral resistance (alfa receptor) Predominance of alfa effects at low concentration Skeletal muscle blood vessel dilatation (beta2 receptor)
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Epinephrine produces all of the following effects EXCEPT:
Decrease in oxygen consumption Bronchodilation Hyperglycemia Mydriasis
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Epinephrine is used in the treatment of all of the following disorders EXCEPT:
Bronchospasm Anaphylactic shock Cardiac arrhythmias Open-angle glaucoma
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Compared with epinephrine, norepinephrine produces all of the following effects EXCEPT:
Similar effects on beta1 receptors in the heart and similar potency at an alfa receptor Decrease the mean pressure below normal before returning to the control value Significant tissue necrosis if injected subcutaneously Increase both diastolic and systolic blood pressure
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Norepinephrine produces:
Vasoconstriction Vasodilatation Bronchodilation Decresed potassium concentration in the plasma
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Which of the following direct-acting drugs is a relatively pure alfa agonist, an effective mydriatic and decongestant and can be used to raise blood pressure?
Epinephrine Norepinephrine Phenylephrine Ephedrine
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Characteristics of methoxamine include all of the following EXCEPT:
It is a direct-acting alfa1-receptor agonist It increases heart rate, contractility and cardiac output It causes reflex bradycardia It increases total peripheral resistance
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