Pharmacology mcqs (final control) 3rd course

= Homatropine

~ Ipratropium
63- Which of the following agents is used as an inhalation drug in asthma?
~ Atropine

= Ipratropium

~ Lobeline
~ Homatropine

64- Sympathetic stimulation is mediated by:

~ Release of norepinephrine from nerve terminals
~ Activation of adrenoreceptors on postsynaptic sites
~ Release of epinephrine from the adrenal medulla

= All of the above

65- Characteristics of epinephrine include all of the following EXCEPT:
~ It is synthesized into the adrenal medulla

= It is synthesized into the nerve ending

~ It is transported in the blood to target tissues
~ It directly interacts with and activates adrenoreceptors
66- Which of the following sympathomimetics acts indirectly?
~ Epinephrine
~ Norepinephrine

= Ephedrine

~ Methoxamine
67- Indirect action includes all of the following properties EXCEPT:
~ Displacement of stored catecholamines from the adrenergic nerve ending
~ Inhibition of reuptake of catecholamines already released

= Interaction with adrenoreceptors

~ Inhibition of the release of endogenous catecholamines from peripheral adrenergic neurons
68- Ephedrine causes:
~ Miosis

= Bronchodilation

~ Hypotension
~ Bradycardia
69- Compared with epinephrine, ephedrine produces all of the following features EXCEPT:

= It is a direct-acting sympathomimetic

~ It has oral activity
~ It is resistant to MAO and has much longer duration of action
~ Its effects are similar, but it is less potent
70- Which of the following sympathomimetics is preferable for the treatment of chronic orthostatic hypotension?
~ Epinephrine
~ Norepinephrine