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Pharmacology: Agonists Explained

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Questions and Answers

Which drug is an example of a β receptor agonist?

Hydrocodone

Adrenaline

Salbutamol (correct)

Antagonist

What is the primary function of an agonist in pharmacology?

To increase receptor affinity without a response

To block receptor activity

To produce a physiological effect similar to a natural signal (correct)

To reduce the efficacy of physiological signals

Which of the following is true about agonists?

Agonists bind to receptors and do not form a complex

Agonists exhibit both full affinity and full efficacy (correct)

Agonists only activate receptors at a high concentration

Agonists have full affinity but no efficacy

What happens when an agonist binds to a receptor?

<p>Formation of a drug-receptor complex that produces effects</p> Signup and view all the answers

Which of the following statements about adrenaline is correct?

<p>It acts as both an α and β receptor agonist</p> Signup and view all the answers

Study Notes

Agonist

An agonist is a drug that binds to a receptor and produces a pharmacological effect or cellular response similar to a physiological signal.
The agonist binds to the receptor to form a complex, denoted as D + R → DR (complex), which then triggers the desired effects.
Agonists possess full affinity to the receptor and full efficacy in producing the desired response.
Examples of agonists include:
- Salbutamol, which acts as a β receptor agonist
- Adrenaline, which acts as both an α and β receptor agonist

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Description

This quiz covers the concept of agonists in pharmacology, detailing how these drugs bind to receptors to produce physiological effects. Explore key examples like Salbutamol and Adrenaline and understand their roles as receptor agonists. Test your knowledge on drug-receptor interactions and their impact on cellular responses.