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16 Questions

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Adrenergic Agonist Agents and Receptors

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Questions and Answers

Which of the following beta-2 agonists is also used to delay labor in premature birth?

Pirbuterol

Metaproterenol

Terbutaline (correct)

Salmeterol

What is the primary mechanism of action of amphetamines?

Blockade of beta-2 receptors

Release of norepinephrine from presynaptic terminals (correct)

Activation of alpha-1 receptors

Inhibition of norepinephrine reuptake

Which of the following is a mixed-action adrenergic agent?

Metaproterenol

Cocaine

Ephedrine (correct)

Salmeterol

What is a common side effect of adrenergic agonists?

Arrhythmias Signup and view all the answers

Which of the following is a local anesthetic that blocks the Na+/K+ pump required for reuptake of norepinephrine?

Cocaine Signup and view all the answers

What is Metaraminol used for?

Treatment of shock Signup and view all the answers

What is the primary receptor through which epinephrine acts at low doses?

Beta 1 receptors Signup and view all the answers

Which of the following is a therapeutic use of norepinephrine?

Acute hypotension Signup and view all the answers

What is the primary effect of dopamine on the cardiovascular system?

Increased chronotropic effect Signup and view all the answers

Which of the following receptors is responsible for the vasodilation effect of epinephrine?

Beta 2 receptors Signup and view all the answers

What is the effect of epinephrine on the respiratory system?

Bronchodilation Signup and view all the answers

Which of the following is a side effect of epinephrine?

All of the above Signup and view all the answers

What is the primary receptor through which dopamine acts?

D1 and A1 receptors Signup and view all the answers

Which of the following is a therapeutic use of dobutamine?

Congestive heart failure Signup and view all the answers

What is the effect of norepinephrine on peripheral resistance?

Increased peripheral resistance Signup and view all the answers

Which of the following is a characteristic of epinephrine's pharmacokinetics?

Rapid onset but brief duration Signup and view all the answers