Adrenergic Agonists and Their Effects
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Questions and Answers

What is the mechanism of action of sympathomimetics?

Sympathomimetics mimic the effect of a sympathetic agonist, but do not bind to alpha or beta adrenergic receptors.

What is the effect of alpha blockers on the vasoconstrictor action of epinephrine?

Alpha blockers convert the vasoconstrictor effect of epinephrine into a vasodilator effect.

What is the mechanism of action of guanethidine?

Guanethidine inhibits the release of norepinephrine.

What is the effect of reserpine on norepinephrine stores?

<p>Reserpine depletes norepinephrine stores.</p> Signup and view all the answers

What is the mechanism of action of clonidine and methyldopa?

<p>Clonidine and methyldopa are alpha-2 receptor agonists in the CNS.</p> Signup and view all the answers

What is the effect of MAOIs on monoamine neurotransmitters?

<p>MAOIs inhibit the enzymatic degradation of monoamines.</p> Signup and view all the answers

What is the effect of cocaine and methylphenidate on norepinephrine and dopamine?

<p>Cocaine and methylphenidate inhibit the reuptake of norepinephrine and dopamine.</p> Signup and view all the answers

What is the effect of tyramine on norepinephrine release?

<p>Tyramine stimulates the release of stored norepinephrine.</p> Signup and view all the answers

What is the effect of atropine on the vasovagal reflex?

<p>Atropine blocks the vasovagal reflex.</p> Signup and view all the answers

What is the mechanism of action of amphetamine and ephedrine?

<p>Amphetamine and ephedrine stimulate the release of stored norepinephrine.</p> Signup and view all the answers

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