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Pharmacology: Naloxone Mechanism of Action Quiz

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Pharmacology: Naloxone Mechanism of Action Quiz

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Questions and Answers

How does naloxone [Narcan] reverse the effects of morphine toxicity?

Preventing activation of receptors (correct)

Blocking transmitter reuptake

Interfering with transmitter storage

Inhibiting transmitter release

What is the direct action of morphine and naloxone at the receptor sites?

Preventing transmitter storage

Causing and preventing receptor activation, respectively (correct)

Enhancing transmitter reuptake

Promoting transmitter release

Which statement about peripheral nervous system (PNS) drugs is inaccurate?

Many PNS drugs act by altering synaptic transmission

These drugs work by influencing receptor activity

Drugs affecting axonal conduction have a variety of uses (correct)

Drugs that alter synaptic transmission can be highly selective

What is the effect of morphine on receptor activation?

Causing receptor activation Signup and view all the answers

Which action is most likely performed by drugs affecting axonal conduction?

Altering transmission speed along nerves Signup and view all the answers

What is a characteristic of drugs that alter synaptic transmission?

Being highly selective in their action Signup and view all the answers

What is the main reason why drugs that affect synaptic transmission can be highly selective?

Each transmitter has different effects on receptor sites Signup and view all the answers

What does a nonselective agonist drug do?

It directly activates receptors to affect many physiologic processes Signup and view all the answers

When a drug activates receptors in the peripheral nervous system by increasing transmitter synthesis, what is the main effect of this drug?

Increase receptor activation Signup and view all the answers

Which statement is true regarding the action of nonselective agonist drugs on receptor sites?

They activate a variety of receptor sites Signup and view all the answers

How do drugs that alter transmitter synthesis impact receptor activation?

Decrease receptor activation Signup and view all the answers

What is the main difference between agonists and antagonists in terms of receptor activation?

Agonists directly activate receptors, while antagonists prevent receptor activation Signup and view all the answers