Adrenergic Agonists Quiz

The following is an α2 adrenergic agonist used as eyedrops to lower intraocular pressure:

• Brinzolamide

• Bambuterol

• Brimonidine

• Latanoprost

Apraclonidine is a clonidine congener which is used:

• To suppress opioid withdrawal syndrome

• To suppress menopausal syndrome

• As Analgesic

• To reduce intraocular tension

Which of the following is a noncatecholamine sympathomimetic:

• Adrenaline

• Ephedrine

• Dopamine

• Isoprenaline

The α2 adrenoceptors are:

• Prejunctional only

• Prejunctional, postjunctional as well as extrajunctional in location

• Selectively activated by phenylephrine

• Selectively blocked by clonidine

A sympathomimetic amine that acts almost exclusively by releasing noradrenaline from the nerve endings is:

• Ephedrine

• Dopamine

• Isoprenaline

• Tyramine

The following sympathomimetic amine has agonistic action on α1 + α2 + β1 + β3 adrenoceptors, but not on β2 receptors:

• Adrenaline

• Noradrenaline

• Isoprenaline

• Phenylephrine

The following action of adrenaline is not mediated by β receptors:

• Dilatation of blood vessels

• Dilatation of pupil

• Bronchodilation

• Renin release from kidney

Adrenaline is inactive orally because it is:

• Not absorbed from the gastrointestinal tract

• Destroyed by gastric acid

• Completely metabolized in the intestinal mucosa and liver before reaching systemic circulation

• Taken up by adrenergic nerve endings of the intestinal wall, liver and lungs

Adrenaline raises blood glucose level by the following actions except:

• Inducing hepatic glycogenolysis

• Inhibiting insulin secretion from pancreatic β cells

• Augmenting glucagon secretion from pancreatic α cells

• Inhibiting peripheral glucose utilization

Noradrenaline is administered by:

• Subcutaneous injection

• Intramuscular injection

• Slow intravenous infusion

• All of the above routes